Showing 1 – 50 of 119 results.
Curated
Community Hospital Program (CHP) Access Impact Evaluation Surveys, 1978-1979, 1981 (ICPSR 8245)
Released/updated on: 2006-01-12
Geographic coverage: United States
Time period: 1978-01-01--1979-01-01
This data collection evaluates group medical practices and the ways in which they affect both access to and use of medical services. Group practices, sponsored by the Robert Wood Johnson Foundation Community Hospital Program (CHP), were selected for use in this assessment. The data were collected by the Center for Health Administration Studies at the University of Chicago, with the assistance of Chilton Research Services. Two surveys were conducted for the study: a baseline survey in 1978-1979 and a follow-up in 1981. Community residents and CHP patients in 12 communities were interviewed. Demographic and medical care data were collected for selected individuals and families in the survey areas. Data on regular sources of medical care for individuals include the type of organization used, type of practice, accessibility, frequency of visits, types of health care professionals seen, cost, and satisfaction. Also in the collection are data on perceived health, episodes of illness (including symptoms, duration, disability days, and doctors consulted), use of preventive health care services, and insurance coverage. Demographic data for individuals and families include age, sex, race, educational attainment, employment, and income. Of the 198 files in this collection, 88 are "raw" data files and 110 are frequencies. The data files consist of four types. The first type are Sample Person files. These contain the responses of group practice patients and community members. The second type are Doctor Episode files, which record doctors and episodes of illness. Family files make up the third type of file, and consist of family members' responses to the survey. Analysis files, linking patient and doctor data, are the fourth type of file. The SPSS frequency files correspond to the data files: two per file for the Sample Person files, and one per file for the remaining three types of files.
Curated
Partially restricted
Community Tracking Study Household Survey, 1996-1997, and Followback Survey, 1997-1998: [United States] (ICPSR 2524)
Released/updated on: 2024-02-14
Geographic coverage: United States
Time period: 1996-07-01--1997-07-01, 1997-10-01--1998-08-01
This data collection comprises two components of the Community Tracking Study (CTS), the Household Survey and the Followback Survey. The CTS, sponsored by the Robert Wood Johnson Foundation, is a national study designed to track changes in the health care system and their effects on care delivery and individuals. Central to the design of the CTS is its community focus. Sixty sites (51 metropolitan areas and 9 nonmetropolitan areas) were randomly selected to form the core of the CTS and to be representative of the nation as a whole. The Household Survey was administered to households in the 60 CTS sites and to a supplemental national sample of households. At the beginning of each interview, a household informant was identified and queried about the composition of the household. With this information, individuals in the household were grouped into family insurance units (FIU). An FIU reflects family groupings typically used by insurance carriers. It includes an adult household member, his or her spouse, if any, and any dependent children 0-17 years of age (or 18-22 years of age if a full-time student). Family informants, selected from each FIU in the household, provided information on health insurance coverage, health care use, usual source of care, and the general health of all persons in the FIU. These informants also provided information on family income and out-of-pocket expenses for health care, as well as employment, race, and Hispanic origin for all adult FIU members. Each adult in the household, including the FIU informants, responded through a self-response module to questions regarding unmet health care needs, patient trust, satisfaction with physician choice, limitations in daily activities, smoking behaviors, and last doctor visit. In FIUs with more than one child under 18, only one child was randomly selected for inclusion in the survey. The family informant responded on behalf of the child regarding unmet needs and satisfaction with physician choice. The adult family member who took this child to his or her last doctor visit responded to questions about the visit. The Followback Survey was designed to obtain detailed information on private health insurance coverage reported in the Household Survey. It was administered to health plans and other organizations that offered or administered the comprehensive private health insurance policies covering Household Survey respondents in the 60 CTS sites. Information on private health insurance policies collected by the Followback Survey includes product type, gatekeeping, consumer cost sharing, provider payment methods, and coverage of mental health and/or substance abuse services.
Curated
Partially restricted
Community Tracking Study Household Survey, 1998-1999, and Followback Survey, 1998-2000: [United States] (ICPSR 3199)
Released/updated on: 2024-02-14
Geographic coverage: United States
Time period: 1998-01-01--2000-01-01
This collection comprises the second round of the Community Tracking Study (CTS) Household Survey and the second round of the CTS Followback Survey. The CTS, sponsored by the Robert Wood Johnson Foundation, is a national study designed to track changes in the health care system and their effects on care delivery and individuals. Fifty-one metropolitan areas and nine nonmetropolitan areas were randomly selected to form the core of the CTS and to be representative of the nation as a whole. As in the first round of the Household Survey (COMMUNITY TRACKING STUDY HOUSEHOLD SURVEY, 1996-1997, AND FOLLOWBACK SURVEY, 1997-1998: [UNITED STATES] (ICPSR 2524)), the second round of the Household Survey was administered to households in the 60 CTS sites and to a supplemental national sample of households. Respondents provided information about household composition and demographic characteristics, health insurance coverage, use of health services, unmet health care needs, out-of-pocket expenses for health care, usual source of care, patient trust and satisfaction, last visit to a medical provider, health status and presence of chronic health conditions, risk behaviors and smoking, and employment, earnings, and income. The purpose of the Followback Survey was to obtain detailed information on private health insurance coverage reported in the Household Survey. It was administered to the health plans and other organizations (managed care organizations, third-party administrators, employer or union plans, and employers) that offered or administered the respondents' comprehensive private health insurance policies. Information on private health insurance policies collected by the Followback Survey includes product type, gatekeeping, consumer cost sharing, provider payment methods, and coverage of mental health and/or substance abuse services.
Curated
Partially restricted
Community Tracking Study Household Survey, 2000-2001: [United States] (ICPSR 3764)
Released/updated on: 2024-02-14
Geographic coverage: United States
Time period: 2000-01-01--2001-01-01
This collection comprises the third round of the Community Tracking Study (CTS) Household Survey. The CTS, sponsored by the Robert Wood Johnson Foundation, is a national study designed to track changes in the health care system and the effects of those changes on people. Fifty-one metropolitan areas and nine nonmetropolitan areas were randomly selected to form the core of the CTS and to be representative of the nation as a whole. As in the first two rounds of the Household Survey (ICPSR 2524 and 3199), the third round was administered to households in the 60 CTS sites and to a supplemental national sample of households. Respondents provided information about household composition and demographic characteristics, health insurance coverage, use of health services, unmet health care needs, out-of-pocket expenses for health care, usual source of care, patient trust and satisfaction, last visit to a medical provider, health status and presence of chronic health conditions, risk behaviors and smoking, and employment, earnings, and income. A new set of sample design variables was added to the third round data for variance estimation by statistical software packages other than SUDAAN.
Curated
Partially restricted
Community Tracking Study Household Survey, 2003: [United States] (ICPSR 4216)
Released/updated on: 2007-12-03
Geographic coverage: United States
Time period: 2003-01-01--2004-01-01
This collection contains data and documentation for the fourth round of the Community Tracking Study (CTS) Household Survey. Sponsored by the Robert Wood Johnson Foundation, the CTS is a national study designed to track changes in the United States' health care system and their effects. The fourth round was administered to households in the 60 CTS sites: 51 metropolitan areas and nine nonmetropolitan areas which were randomly selected to form the core of the CTS and to be representative of the nation as a whole. The first round of the CTS Household Survey was conducted in 1996-1997 (ICPSR 2524), the second round in 1998-1999 (ICPSR 3199), and the third in 2000-2001 (ICPSR 3764). Respondents to the fourth round provided information about health insurance coverage, use of health services, unmet needs for health care, children's special health care needs, out-of-pocket medical costs, patient trust in physicians, sources of health information, attitudes about medical care, and satisfaction with health care and health plans. Health status, chronic conditions, and risk attitudes and smoking behavior were additional topics covered by the fourth round questionnaire. The data include variables on height and weight, employment, income, ethnicity, race, United States citizenship, household composition, and demographic characteristics.
Curated
Health Interview Survey, 1963 (ICPSR 28381)
Released/updated on: 2010-11-11
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are six types of records in this year's survey, each in a separate data file. The variables in the Household file (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Family file (Part 2) includes information on family size, sex, race, education, health status of family members, and total health expenses for the family. The Person file (Part 3) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition and Hospital Episode files as well. The Person file also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition file (Part 4) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode file (Part 5) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Health Expenditure file (Part 6) includes medical and health related expenses, such as hospital bills, medicine costs, dental bills, doctor bills, as well as insurance coverage and costs.
Curated
Health Interview Survey, 1964 (ICPSR 28663)
Released/updated on: 2010-07-06
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this year's survey, each in a separate data file. The Family file (Part 1) includes information on family size, sex, race, education, health status of family members, and total health expenses for the family. The Person file (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition and Hospital Episode files as well. The Person file also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition file (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode file (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The X-ray file (Part 5) includes information on X-ray records, doctor visits, height and weight, and total medical X-ray visits.
Curated
Health Interview Survey, 1965 (ICPSR 28761)
Released/updated on: 2010-07-13
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are six types of records in the 1965 survey, each in a separate data file. The Person file (Part 1) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and occupation. These variables are found in the Condition and Hospital Episode files as well. The Person file also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition file (Part 2) contains information for each reported health condition, with specifics on injury and accident reports. The Prescribed Medicine file (Part 3) contains general demographic information, cost of medications, when medications were obtained, and conditions for which medications were prescribed. The Non-prescribed Medicine file (Part 4) contains general demographic information, where medications were obtained and purchased, as well as short-stay hospital episodes. The Diabetes file (Part 5) includes information regarding symptoms of diabetes, genetic variables, and treatment regimen variables. The Hospital Episode file (Part 6) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed.
Curated
Health Interview Survey, 1966 (ICPSR 28801)
Released/updated on: 2010-07-15
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this year's survey, each in a separate data file. The variables in the Household file (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person file (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition file (Part 3) and the Hospital Episode file (Part 4) as well. The Person file also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition file (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode file (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Medical Care Cost file (Part 5) includes information regarding short-stay hospital visits, family income, and total medical bill costs.
Curated
Health Interview Survey, 1967 (ICPSR 28862)
Released/updated on: 2010-07-16
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are six types of records in the 1967 survey, each in a separate data file. The variables in the Household file (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person file (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and occupation. These variables are found in the Condition file (Part 3) and the Hospital Episode file (Part 4) as well. The Person file (Part 2) also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition file (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode file (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit file (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions. The Home Care file (Part 6) documents basic demographic information, eating habits, in-home mobility, hospital visits, and the extent that basic living activities and needs are performed with or without aid.
Curated
Health Interview Survey, 1968 (ICPSR 28881)
Released/updated on: 2010-09-30
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. This 1968 study was a transition for the National Health Interview Survey (NHIS) from fiscal year (July 1 to June 30) to calendar year. The 1968 files include both fiscal year files and calendar year files, with some overlap between corresponding fiscal year and calendar year files. During the fiscal year, the NHIS sample was split and two types of questionnaires were administered to approximately half of the overall sample: the "condition approach" questionnaire and the "person approach" questionnaire. During the second half of calendar year 1968, the entire NHIS sample was interviewed using the person approach questionnaire. During this time period, five NHIS files are referred to as "core" files because they were administered each year (through 1996). The five core files are Household, Person, Condition, Doctor Visit, and Hospital. No evidence of a fiscal year Household file was found, and the existing calendar year Household file had too many anomalies to be included in this release. Thus, this release consists of fiscal year and calendar year versions of four out of the five core files, and three supplement files, for a total of eleven files. The eleven types of records in this year's survey are each in a separate data file. The Person Calendar and Fiscal Year files (Part 1 and Part 6) include information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. The Person files also supply data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition Calendar and Fiscal Year files (Part 2 and Part 7) contain information for each reported health condition, with specifics on injury and accident reports. The Hospital Calendar and Fiscal Year files (Part 3 and Part 8) provide information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit Calendar and Fiscal Year files (Part 4 and Part 8) document doctor visits within the time period and identify acute or chronic conditions. The Motor Vehicle Person Accident Calendar and Fiscal Year files (Part 5 and Part 10) contain information regarding types of motor accidents, how many vehicles were involved in a given accident, injuries acquired from a given accident, time of day the accident occurred, and treatments given as a result of a given accident. The Home Care Fiscal Year file (Part 11) documents basic demographic information, eating habits, in-home mobility, hospital visits, and the extent to which basic living activities and needs are performed with or without aid.
Curated
Health Interview Survey, 1970 (ICPSR 7838)
Released/updated on: 2010-09-21
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household file (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person file (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition, Doctor Visit, and Hospital Episode files as well. The Person file also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition file (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode file (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit file (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions. The Health Insurance file (Part 6) includes information on education level, family income, hospital visits and length of stay, and also data on medical coverage, hospital coverage, medicare coverage, and doctor visit coverage. The Medical Care Cost file (Part 7) includes information on hospital bill expenses, doctor and dental bill expenses, optical bill expenses, and total personal and family expenses. The X-Ray file (Part 8) includes information on x-ray records, doctor visits, height, weight, and total medical x-ray visits.
Curated
Health Interview Survey, 1971 (ICPSR 8336)
Released/updated on: 2010-09-30
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household File (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person File (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition, Doctor Visit, and Hospital Episode Files as well. The Person File also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The variables in the Household File (Part 2) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Condition File (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode File (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit File (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions. A sixth file has been added, along with the five core files. The Person Supplement File (Part 6) provides information on health conditions, hearing quality, doctor visits, and hospital stay information.
Curated
Health Interview Survey, 1972 (ICPSR 8337)
Released/updated on: 2010-09-30
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household File (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person File (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition, Doctor Visit, and Hospital Episode Files as well. The Person File also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition File (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode File (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit File (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions. A sixth file has been added, along with the five core files. The Health Insurance File (Part 6) documents basic demographic information along with medical coverage and health insurance plans, as well as differentiates between hospital, doctor visit, and surgical insurance coverage.
Curated
Health Interview Survey, 1973 (ICPSR 8338)
Released/updated on: 2010-11-29
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household File (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person File (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition, Doctor Visit, and Hospital Episode Files as well. The Person File also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition File (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode File (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit File (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions. A sixth and seventh file have been added, along with the five core files. The Condition Supplement File (Part 6) documents past bed days, duration of limitation of the condition, whether or not a doctor was seen, the type of injury incurred, satisfaction with treatment, whether or not a prescription was given or filled, and if applicable, the reason why medical attention was not sought. The Pregnancy File (Part 7) documents activity restriction, bed disability, work or school loss days, doctor and dental visits within the last two weeks to twelve months, number of chronic conditions, time since routine physical exams have been completed, and the number of times pregnancies have been terminated in the past twelve months, as well as how many live births have occurred over one's lifetime, and routine pregnancy related doctor visits.
Curated
Health Interview Survey, 1974 (ICPSR 8339)
Released/updated on: 2010-11-29
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in the core survey, each in a separate data file. The variables in the Household File (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person File (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition, Doctor Visit, and Hospital Episode Files as well. The Person File also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition File (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode File (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit File (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions. A sixth and seventh file have been added along with the five core files. The Condition Supplement File (Part 6) provides further information regarding injuries, health status, medical advice received, travel time and waiting time for care, and satisfaction with health services provided. The Health Insurance File (Part 7) provides general demographic information as well as type of care obtained through insurance plans, work loss because of current conditions, and whether or not the patient has any type of insurance or no insurance coverage at all.
Curated
Health Interview Survey, 1975 (ICPSR 7672)
Released/updated on: 2010-11-15
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household File (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person File (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition, Doctor Visit, and Hospital Episode File as well. The Person File also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition File (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode File (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit File (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions.
Curated
Health Interview Survey, 1976 (ICPSR 8340)
Released/updated on: 2010-12-03
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household File (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person File (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition, Doctor Visit, and Hospital Episode Files as well. The Person File also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition File (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode File (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit File (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions.
Curated
Health Interview Survey, 1977 (ICPSR 7839)
Released/updated on: 2010-12-14
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household File (Part 1) in this collection include type of living quarters, size of family, and geographic region. The Person File (Part 2) variables include sex, age, race, marital status, veteran status, education, income, occupation, and limits on activity. The Condition File (Part 3) contains variables on the incidence of illness or injury within the past year. The Hospital Episode File (Part 4) contains variables on the incidence of hospitalizations and presence of chronic conditions. The Doctor Visit File (Part 5) includes variables regarding frequency of doctor visits, type of doctor seen, and reasons for each visit. A sixth, seventh, eighth, and ninth file have been provided. The Disability Supplement File (Part 6) contains variables on the need for help, services, and environment modifications. The H1 Supplement File (Part 7) includes basic demographic variables, medical information, health variables, doctor visits, medical insurance, work days lost, and activity level variables. The Special Aids Supplement File (Part 8)includes basic demographic variables, special aids onset and amount needed, medical information, health variables, and doctor visits. The Influenza Supplement File (Part 9) includes basic demographic variables, flu, grippe, or fever onset, work and school days lost, hospital visits, length of stay, and cost of care.
Curated
Health Interview Survey, 1978 (ICPSR 8044)
Released/updated on: 2011-01-05
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household File (Part 1) in this collection include type of living quarters, size of family, and geographic region. The Person File (Part 2) variables include sex, age, race, marital status, veteran status, education, income, occupation, and limits on activity. The Condition File (Part 3) contains variables on the incidence of illness or injury within the past year. The Hospital Episode File (Part 4) contains variables on the incidence of hospitalizations and presence of chronic conditions. The Doctor Visit File (Part 5) includes variables regarding frequency of doctor visits, type of doctor seen, and reasons for each visit. A sixth and seventh file have been provided. The Family Medical Expenses File (Part 6) provides variables including sex, age, race, marital status, veteran status, education, income, industry and occupation codes, and limits on activity. Other variables include amounts paid for personal, family, and outside family dental bills, doctor bills, hospital bills, optical bills, prescription medicine, health insurance, and other medical expenses. Other questions include total personal, family, and outside family medical expenses, including and excluding health insurance, and the sex and race of the family head. The Immunization File (Part 7) includes basic demographic variables, hospital stay length, doctor visit periods, types of immunizations received, and when they were obtained.
Curated
Health Interview Survey, 1981 (ICPSR 8319)
Released/updated on: 2011-04-25
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in the core survey, each in a separate data file. The variables in the Household File (Part 1) include type of living quarters, size of family, number of families in the household, presence of a telephone, number of unrelated individuals, and region. The Person File (Part 2) includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, employment status, and industry and occupation. These variables are found in the Condition, Doctor Visit, and Hospital Episode Files as well. The Person File also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition File (Part 3) contains information for each reported health condition, with specifics on injury and accident reports. The Hospital Episode File (Part 4) provides information on medical conditions, hospital episodes, type of service, type of hospital ownership, date of admission and discharge, number of nights in hospital, and operations performed. The Doctor Visit File (Part 5) documents doctor visits within the time period and identifies acute or chronic conditions. A sixth file has been provided. The Child Health Supplement File (Part 6) provides detailed data on child health and development. This supplement offers information on age of child, sex, birth-date, physical and social development, family relationships, prenatal care, hospitalization and illness, behavior, schooling, and seat-belt usage.
Curated
Health Interview Survey, 1982 (ICPSR 8460)
Released/updated on: 2011-04-06
Geographic coverage: United States
The purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in the 1982 core survey, each in a separate data file. The variables in the Household File (Part 1) in this collection include type of living quarters, size of family, region, condition list assigned, and type of PSU. The Person File (Part 2) variables include sex, age, race, marital status, veteran status, education, income, industry and occupation codes, and limits on activity. The Condition File (Part 3), Doctor Visit File (Part 4), and Hospital Episode File (Part 5) contain information on each reported condition, two-week doctor visit, or hospitalization (twelve-month recall), respectively. A sixth and seventh file have been provided. The Health Insurance Supplement File (Part 6) contains questions about health insurance plans pertaining to the type of plan, including private, Medicare, Medicaid, military and other plans, and coverage or reasons for lack of coverage are provided. The Preventive Care Supplement File (Part 7) contains variables that chronicle when routine tests, physicals, and preventative examinations have last been performed.
Curated
Health Interview Survey, 1983 (ICPSR 8603)
Released/updated on: 2011-04-13
Geographic coverage: United States
The basic purpose of the Health Interview Survey is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive. There are five types of records in this core survey, each in a separate data file. The variables in the Household File (Part 1) include type of living quarters, size of family, number of families in household, and geographic region. The variables in the Person File (Part 2) include sex, age, race, marital status, veteran status, education, income, industry and occupation codes, and limits on activity. These variables are found in the Condition, Doctor Visit, and Hospital Episode Files as well. The Person File also supplies data on height, weight, bed days, doctor visits, hospital stays, years at residence, and region variables. The Condition (Part 3), Doctor Visit (Part 4), and Hospital Episode (Part 5) Files contain information on each reported condition, two-week doctor visit, or hospitalization (twelve-month recall), respectively. A sixth, seventh, eighth, and ninth file have been added, along with the five core files. The Alcohol/Health Practices Supplement File (Part 6) includes information on diet, smoking and drinking habits, and health problems. The Bed Days and Dental Care Supplement File (Part 7) contains information on the number of bed days, the number of and reason for dental visits, treatment(s) received, type of dentist seen, and travel time for visit. The Doctor Services Supplement File (Part 8) supplies data on visits to doctors or other health professionals, reasons for visits, health conditions, and operations performed. The Health Insurance Supplement File (Part 9) documents basic demographic information along with medical coverage and health insurance plans, as well as differentiates between hospital, doctor visit, and surgical insurance coverage.
Curated
Kaiser Permanente Study of the Oldest Old, 1971-1979 and 1980-1988: [California] (ICPSR 4219)
Released/updated on: 2011-02-07
Geographic coverage: United States, California
Time period: 1971-01-01--1988-01-01
This data collection is an epidemiological study of chronic disease in the oldest old. It is based on information collected from Kaiser Permanente facilities in Northern California. Members of Kaiser Permanente Medical Care programs who were aged 65 or older at the time the data were being collected and who had taken a multiphasic health checkup examination within four to six years of the baseline date were included in the study. There are several components to the dataset. Part 1, Master Records, includes information from the morbidity review, in which over 35 chronic conditions or diagnoses were abstracted from the member charts, as well as detailed diagnostic criteria for the major conditions. A prevalence review was done, which included the four years prior to the baseline date for these same conditions. Recurrent disease is included for the following conditions: cancers, myocardial infarction, and various forms of strokes. A detailed account of outpatient health services use, and data from the multiphasic health checkup, which was administered to each participant during the nine yearly follow-ups, are also included in the Master Records file. Part 2, Hospitalization, contains records of causes and dates of hospitalizations and discharges and nursing home admissions. There is also a section on incomplete reviews and the reasons for them. Demographic information and some lifestyle information from the multiphasic health checkup (e.g., smoking, alcohol, and Body Mass Index) are also in this file.
Curated
National Ambulatory Medical Care Survey, 1973 (ICPSR 9192)
Released/updated on: 2008-09-12
Geographic coverage: United States
Time period: 1973-01-01--1974-01-01
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. These national estimates describe the utilization of ambulatory medical care and the nature and treatment of illness among the population seeking ambulatory care. The survey includes data on date of visit, reason for visit, date of birth, sex and race of patient, diagnosis, treatment, disposition of visit, and the physician's specialty.
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National Ambulatory Medical Care Survey, 1975 (ICPSR 9193)
Released/updated on: 2008-09-12
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. These national estimates describe the utilization of ambulatory medical care and the nature and treatment of illness among the population seeking ambulatory care. The survey includes data on date of visit, reason for visit, date of birth, sex and race of patient, diagnosis, treatment, disposition of visit, and the physician's specialty.
Curated
National Ambulatory Medical Care Survey, 1976 (ICPSR 9194)
Released/updated on: 2008-09-12
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. These national estimates describe the utilization of ambulatory medical care and the nature and treatment of illness among the population seeking ambulatory care. The survey includes data on date of visit, reason for visit, date of birth, sex and race of patient, diagnosis, treatment, disposition of visit, and the physician's specialty.
Curated
National Ambulatory Medical Care Survey, 1977 (ICPSR 8046)
Released/updated on: 1992-02-16
Geographic coverage: United States
The National Ambulatory Medical Care Survey (NAMCS) contains data on medical care provided in physicians' offices and is a continuously sampled survey based on a nationwide sample of patient records.
Curated
National Ambulatory Medical Care Survey, 1978 (ICPSR 8047)
Released/updated on: 1992-02-16
Geographic coverage: United States
The National Ambulatory Medical Care Survey (NAMCS) contains data on medical care provided in physicians' offices and is a continuously sampled survey based on a nationwide sample of patient records.
Curated
National Ambulatory Medical Care Survey, 1979 (ICPSR 8048)
Released/updated on: 1992-02-16
Geographic coverage: United States
The National Ambulatory Medical Care Survey (NAMCS) contains data on medical care provided in physicians' offices and is a continuously sampled survey based on a nationwide sample of patient records.
Curated
National Ambulatory Medical Care Survey, 1980 (ICPSR 8385)
Released/updated on: 2008-09-12
Geographic coverage: United States
Time period: 1980-01-01--1980-12-31
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1980 survey contains information from approximately 46,000 patient visits to 1,870 physicians. Data are available on the patient's reason for the visit, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Information is included on the physician's specialization and geographical location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
Curated
National Ambulatory Medical Care Survey, 1980: Drug Mentions (ICPSR 9174)
Released/updated on: 1992-02-16
Geographic coverage: United States
This data collection is the latest in a series of surveys that offer information on patients' visits to a national sample of office-based physicians. The National Ambulatory Medical Care Surveys (NAMCS) collect information on all drugs/medications ordered, administered, or provided during the visits. In 1980 51,372 drugs were mentioned in the national sample of 46,081 patient visits. The data items include the medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes.
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National Ambulatory Medical Care Survey, 1981 (ICPSR 8386)
Released/updated on: 2008-09-12
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1981 survey contains information from approximately 43,000 patient visits to 1,807 physicians. Data are available on the patient's reason for the visit, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Information is included on the physician's specialization and geographical location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
Curated
National Ambulatory Medical Care Survey, 1981: Drug Mentions (ICPSR 9175)
Released/updated on: 1992-02-16
Geographic coverage: United States
This data collection is the latest in a series of surveys that offer information on patients' visits to a national sample of office-based physicians. The National Ambulatory Medical Care Surveys (NAMCS) collect information on all drugs/medications ordered, administered, or provided during the visits. In 1981 45,610 drugs were mentioned in the national sample of 43,366 patient visits. The data items include the medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes.
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National Ambulatory Medical Care Survey, 1985 (ICPSR 8902)
Released/updated on: 2008-09-15
Geographic coverage: United States
Time period: 1985-03-01--1986-02-01
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1985 survey, the tenth in a series of annual surveys, contains information from approximately 2,879 physicians. Data are available on the number of office visits by the patient, the nature and length of the visits, the patient's problem, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Information is also included on the physician's specialization, type of practice, and geographical location. Demographic information on patients was also collected.
Curated
National Ambulatory Medical Care Survey, 1985: Drug Mentions (ICPSR 9096)
Released/updated on: 1992-02-16
Geographic coverage: United States
This data collection is the latest in a series of surveys that offers information on patients' visits to a national sample of office-based physicians. The National Ambulatory Medical Care Surveys collected information on all drugs/medications ordered, administered, or provided during the visits. The data items include the medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes.
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National Ambulatory Medical Care Survey, 1989 (ICPSR 9830)
Released/updated on: 1993-02-12
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1989 survey contains information from 38,384 patient visits to 1,421 physicians. Data are available on the patient's reason for the visit, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Information is included on the physician's specialization and geographic location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1989: Drug Mentions (ICPSR 6498)
Released/updated on: 1995-06-05
Geographic coverage: United States
This data collection is part of a series of surveys that gather information on patients' visits to a national sample of office-based physicians. The Drug Mentions files of the National Ambulatory Medical Care Surveys offer information on all drugs/medications ordered, administered, or provided during the visits. Data items include the medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, related ingredient codes, and demographic items such as age, sex, race, and ethnicity of the patient.
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National Ambulatory Medical Care Survey, 1990 (ICPSR 9831)
Released/updated on: 1993-02-12
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1990 survey contains information from 43,469 patient visits to 1,684 physicians. Data are available on the patient's reason for the visit, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Information is included on the physician's specialization and geographical location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1990: Drug Mentions (ICPSR 6298)
Released/updated on: 1994-05-20
Geographic coverage: United States
This data collection is part of a series of surveys that offers information on patients' visits to a national sample of office-based physicians. The National Ambulatory Medical Care Surveys collected information on all drugs/medications ordered, administered, or provided during the visits. The data items include the medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, related ingredient codes, and demographic items such as age, sex, race, and ethnicity.
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National Ambulatory Medical Care Survey, 1991 (ICPSR 6430)
Released/updated on: 1996-06-10
Geographic coverage: United States
The National Ambulatory Medical Care Survey (NAMCS) provides data from samples of patient records selected from a national sample of office-based physicians. These national estimates describe the utilization of ambulatory medical care services in the United States. In 1991, there were 33,795 patient records provided by 1,354 doctors who participated in the survey. The survey obtains information on the age, race, and sex of the patient, and on physician characteristics such as geographic location and specialization. Data describing the nature of the office visit include the expected source of payment, patient's problem, prior visit status, referral status, physician's diagnoses, diagnostic and therapeutic services provided, and disposition and duration of the visit. Other variables cover drugs/medications ordered, administered, or provided during office visits, such as medication code, generic name and code, brand name, entry status, prescription status, composition status, and related ingredient codes.
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National Ambulatory Medical Care Survey, 1991: Drug Mentions (ICPSR 6431)
Released/updated on: 1995-03-16
Geographic coverage: United States
This data collection is part of a series of surveys that offers information on patients' visits to a national sample of office-based physicians. The National Ambulatory Medical Care Survey Drug Mentions files contain information on all drugs/medications ordered, administered, or provided during office visits. The data items include medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Also included are demographic items describing the patient, such as age, sex, race, and ethnicity.
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National Ambulatory Medical Care Survey, 1992 (ICPSR 6528)
Released/updated on: 1995-08-16
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1992 survey contains information from 34,606 patient visits to 1,558 physicians. Data are available on the patient's reason for the visit, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Information is included on the physician's specialization and geographical location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1993 (ICPSR 6725)
Released/updated on: 1996-10-01
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1993 survey contains information from 35,978 patient visits to 1,802 physicians' offices. Data are available on the patient's smoking habits, reason for the visit, expected source of payment, the physician's diagnosis, medications ordered, and the kinds of diagnostic and therapeutic services rendered. Information is included on the physician's specialization and geographic location. The file also supplies drug mentions data, such as medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1994 (ICPSR 6825)
Released/updated on: 1997-01-09
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1994 survey contains information from 33,598 patient visits to 1,704 physicians' offices. Data are available on the patient's smoking habits, reason for the visit, expected source of payment, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Other variables cover drugs/medications ordered, administered, or provided during office visits, such as medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Information is included on the physician's specialization and geographic location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1995 (ICPSR 2354)
Released/updated on: 1998-11-16
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1995 survey contains information from 36,875 patient visits to 1,883 physicians' offices. Data are available on the patient's smoking habits, reason for the visit, expected source of payment, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Other variables cover drugs/medications ordered, administered, or provided during office visits, such as medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Information is included on the physician's specialization and geographic location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1996 (ICPSR 2355)
Released/updated on: 1998-11-16
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1996 survey contains information from 29,805 patient visits to 1,500 physicians' offices. Data are available on the patient's smoking habits, reason for the visit, expected source of payment, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Other variables cover drugs/medications ordered, administered, or provided during office visits, such as medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Information is included on the physician's specialization and geographic location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1997 (ICPSR 2690)
Released/updated on: 1999-04-30
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1997 survey contains information from 24,715 patient visits to 1,247 physicians' offices. Data are available on the patient's smoking habits, reason for the visit, expected source of payment, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Other variables cover drugs/medications ordered, administered, or provided during office visits, with information on medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Information is also included on the physician's specialization and geographic location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1998 (ICPSR 2915)
Released/updated on: 2000-08-01
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1998 survey contains information from 24,715 patient visits to 1,247 physicians' offices. Data are available on the patient's smoking habits, reason for the visit, expected source of payment, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Other variables cover drugs/medications ordered, administered, or provided during office visits, with information on medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Information is also included on the physician's specialization and geographic location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
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National Ambulatory Medical Care Survey, 1999 (ICPSR 3159)
Released/updated on: 2001-06-27
Geographic coverage: United States
The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1999 survey contains information from 20,760 patient visits to 1,087 physicians' offices. Data are available on the patient's smoking habits, reason for the visit, expected source of payment, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Other variables cover drugs/medications ordered, administered, or provided during office visits, with information on medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Information is also included on the physician's specialization and geographic location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.