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Showing 1 – 18 of 18 results.
Curated

Alameda County [California] Health and Ways of Living Study, 1974 Panel (ICPSR 6838)

Released/updated on: 2008-01-31
Geographic coverage: United States, California
These data constitute the second wave of a survey designed to study the influence of health practices and social relationships on the physical and mental health of a typical sample of the population. The first wave (HEALTH AND WAYS OF LIVING STUDY, 1965 PANEL [ALAMEDA COUNTY, CALIFORNIA] [ICPSR 6688]) collected information for 6,928 respondents (including approximately 500 women aged 65 years and older) on chronic health conditions, health behaviors, social involvements, and psychological characteristics. The 1974 questionnaire was sent to 6,246 living subjects who had responded in 1965, and were able to be located. A total of 4,864 individuals responded in 1974. Questions were asked on marital and life satisfaction, parenting, physical activities, employment, and childhood experiences. Demographic information on age, race, height, weight, education, income, and religion was also collected. Included with this dataset is a separate file (Part 2) containing mortality data for respondents who died between the 1965 and 1974 panels, and information on nonrespondents.
Curated

Alameda County [California] Health and Ways of Living Study, 1994 and 1995 Panels (ICPSR 3083)

Released/updated on: 2006-03-06
Geographic coverage: United States, California
This collection provides a 30-year follow-up with respondents from Alameda County who were originally interviewed in 1965 for the first wave of the Health and Ways of Living Study. The purpose of the survey was to explore the influences of health practices and social relationships on the physical and mental health of a typical sample of the population. The first wave of the study, HEALTH AND WAYS OF LIVING STUDY, 1965 PANEL: [ALAMEDA COUNTY, CALIFORNIA] (ICPSR 6688), collected information for 6,928 respondents (including approximately 500 women aged 65 years and older) on chronic health conditions, health behaviors, social involvements, and psychological characteristics. The second wave, the 1974 panel (ALAMEDA COUNTY [CALIFORNIA] HEALTH AND WAYS OF LIVING STUDY, 1974 PANEL [ICPSR 6838]), collected information from 4,864 of the original respondents. The third and fourth waves (1994 and 1995 panels, respectively), provided in this collection, explore some new topics. The third wave provides a follow-up of 2,729 original 1965 and 1974 respondents and examines health behaviors such as alcohol consumption and smoking habits, along with social activities. Also included is information on health conditions such as diabetes, osteoporosis, hormone replacement, and mental illness. Another central topic investigated is activities of daily living (including self-care such as dressing, eating, and shopping), along with use of free time and level of involvement in social, recreational, religious, and environmental groups. The fourth wave is a follow-up to the 1994 panel, and contains 2,569 cases. This wave examines changes in functional abilities such as self-care activities, employment, involvement in community activities, visiting friends/family, and use of free time since 1994.
Curated

Alameda County [California] Health and Ways of Living Study, 1999 Panel (ICPSR 4432)

Released/updated on: 2006-11-16
Geographic coverage: United States, California
This fifth wave of data, collected in 1999, provides follow-up with 2,123 respondents from Alameda County who were originally interviewed in 1965 for the first wave of the Health and Ways of Living Study. The purpose of the survey was to explore the influences of health practices and social relationships on the physical and mental health of a typical sample of the population. Part 2 of this collection contains mortality data including cause and year of death. The first wave of the study, HEALTH AND WAYS OF LIVING STUDY, 1965 PANEL: [ALAMEDA COUNTY, CALIFORNIA] (ICPSR 6688), collected information for 6,928 respondents (including 360 men and 530 women aged 65 years and older) on chronic health conditions, health behaviors, social involvements, and psychological characteristics. The second wave, the 1974 panel, ALAMEDA COUNTY [CALIFORNIA] HEALTH AND WAYS OF LIVING STUDY, 1974 PANEL (ICPSR 6838), collected information from 4,864 of the original respondents. The third and fourth waves, ALAMEDA COUNTY [CALIFORNIA] HEALTH AND WAYS OF LIVING STUDY, 1994 and 1995 PANELS (ICPSR 3083), provided a follow-up of 2,729 original 1965 and 1974 respondents. The fourth wave is a follow-up to the 1994 panel and contains 2,569 cases.
Curated
Simple Crosstabs

Health and Ways of Living Study, 1965 Panel: [Alameda County, California] (ICPSR 6688)

Released/updated on: 2013-12-04
Geographic coverage: United States, California
The purpose of this survey was to explore the influence of health practices and social relationships on the physical and mental health of a typical sample of the population in Alameda County, California. The information obtained for the 6,928 respondents (including approximately 500 women aged 65 years and older) covers chronic health conditions, health behaviors, social involvements, and psychological characteristics. Questions were asked about marital and life satisfaction, parenting, physical activities, employment, and childhood experiences. Demographic variables include data on respondetns' age, race, height, weight, education, income, and religion.
Curated
Simple Crosstabs

Midlife in the United States (MIDUS 1) National Study of Daily Experiences (NSDE), 1996-1997 (ICPSR 3725)

Released/updated on: 2023-01-25
Geographic coverage: United States
Time period: 1996-03-01--1997-03-01
The National Study of Daily Experiences (NSDE) is one of the in-depth studies that are part of the MacAuthur Foundation National Survey of Midlife in the United States (MIDUS). The purpose of the NSDE is to examine the day-to-day lives, particularly the daily stressful experiences, of a subsample of MIDUS respondents. Although previous daily diary research has advanced understanding of daily stress processes, there are important limitations in these studies that are addressed in the NSDE. First, previous studies in this area have relied on small and often unrepresentative samples that limit the ability to generalize findings. For this reason, the NSDE uses a large national sample of adults in the United States. Second, previous studies of individual differences in exposure and reactivity to daily events have typically examined only one source of variability, such as personality, to the exclusion of others. The NSDE corrects this problem by utilizing the data collected in the larger MIDUS survey on a wide array of sociodemographic and psychosocial variables to study the determinants of exposure and reactivity to daily stress. Third, previous studies have failed to investigate the role of genetics in both exposure and reactivity to daily stressors. The NSDE has a subsample of identical and fraternal same-sex twin pairs in order to explore this issue. The twins were selected if twin pairs had high self-reported certainty of zygosity, had completed the MIDUS interview and questionnaires, and had mailed in their cheek cell samples. A wide range of information was obtained using the daily telephone interview. Conducting interviews for an entire year provided information about seasonal variation in daily experiences. Respondents completed an average of 7.2 of the 8 interviews resulting in a total of 10,397 days of interviews. Data collection consisted of 40 separate "flights" of interviews with each flight representing the eight-day sequence of interviews from approximately 33 respondents. The entire interview was CATI programmed, which enabled researchers to incorporate skip patterns and open ended probe questions as well as to keypunch data during the interview, allowing data cleaning throughout the data collection. Demographic information includes gender and age.
Curated

SABE - Survey on Health, Well-Being, and Aging in Latin America and the Caribbean, 2000 (ICPSR 3546)

Released/updated on: 2006-02-17
Geographic coverage: Cuba, Argentina, Barbados, Uruguay, Brazil, Mexico, Chile, Global
Time period: 1999-01-01--2000-01-01
The Survey on Health, Well-Being, and Aging in Latin America and the Caribbean (Project SABE) was conducted during 1999 and 2000 to examine health conditions and functional limitations of persons aged 60 and older in the countries of Argentina, Barbados, Brazil, Chile, Cuba, Mexico, and Uruguay, with special focus on persons over 80 years of age. Project SABE was administered in the official language of each country: Spanish in Buenos Aires (Argentina), Mexico City (Mexico), Santiago (Chile), Havana (Cuba), and Montevideo (Uruguay), English in Bridgetown (Barbados), and Portuguese in Sao Paulo (Brazil). Goals of the project were to (a) describe the health conditions of older adults (aged 60 and older with special focus on persons over 80) with regard to chronic and acute diseases, disability, and physical and mental impairment, (b) evaluate the extent to which older adults used and had access to health care services, including services that are outside the formal system (local healers, traditional medicine), (c) evaluate the proportional contribution by principal sources of support -- relatives and family networks, public assistance, and private resources (income, assets) -- towards meeting the health-related needs of older adults, (d) evaluate access to health insurance offered by private organizations, governmental institutions, and mixed systems, as well as the extent to which that insurance was actually used, (e) analyze the differentials in the self-evaluation of health conditions, access to health care, and sources of support with regard to socioeconomic group, gender, and birth cohort, (f) evaluate the relationships between strategic factors -- health-related behavior, occupational background, socioeconomic status, gender, and cohort -- and health conditions, according to the health evaluation at the time of the survey, and (g) carry out comparative analyses in countries that share similar characteristics but that differ with regard to such factors as the role of family support, public assistance, access to health services, and health-related behavior and exposure to risk. Demographic variables include age, sex, race, level of education, birthplace, religion, ethnic group, marital status, and income. Also examined were cognitive status, health status, functional status, nutritional status, and use and accessibility of services
Curated
Partially restricted

Sacramento Area Latino Study on Aging (SALSA Study), 1996-2008 (ICPSR 22760)

Released/updated on: 2009-06-29
Geographic coverage: Sacramento, United States, California
Time period: 1996-01-01--2008-01-01

The Sacramento Area Latino Study on Aging (SALSA Study) project tracked the incidence of physical and cognitive impairment as well as dementia and cardiovascular diseases in elderly Latinos in the Sacramento, California, region. The SALSA project aimed to assess cognitive, physical and social functions, which include the ability to follow instructions, to perform certain movements, and to interact with others. The study explored the effects that cultural, nutritional, social and cardiovascular risk factors have on overall health and dementia, and examined the association between diabetes and functional status. Demographic information includes age given at follow-up visits, country of birth, language, religion, marital status, educational level, occupation, household income, and size of household.

Curated
Partially restricted
Simple Crosstabs

Sacramento Area Latino Study on Aging (SALSA Study), 1996-2008: Demographic Data (ICPSR 34483)

Released/updated on: 2012-12-11
Geographic coverage: Sacramento, United States, California
Time period: 1996-01-01--2008-01-01

This study contains demographic variables for the the Sacramento Area Latino Study on Aging (SALSA) Series and can be used with ICPSR studies 22760, 29321, 29322, 29323. Demographic variables include gender, primary language, country of origin, state of birth, cause of death, 2000 census tract codes, birth date, date of death, and age given at follow-up visits.

About SALSA: The Sacramento Area Latino Study on Aging (SALSA Study) project tracked the incidence of physical and cognitive impairment as well as dementia and cardiovascular diseases in elderly Latinos in the Sacramento, California, region. The SALSA project aimed to assess cognitive, physical, and social functions, which include the ability to follow instructions, to perform certain movements, and to interact with others. The study explored the effects that cultural, nutritional, social, and cardiovascular risk factors have on overall health and dementia, and examined the association between diabetes and functional status.

Curated
Partially restricted

Sacramento Area Latino Study on Aging (SALSA Study), 1996-2008: Neuroclinical Exam Data (ICPSR 29322)

Released/updated on: 2017-02-23
Geographic coverage: Sacramento, United States, California
Time period: 1996-01-01--2008-01-01

The Sacramento Area Latino Study on Aging (SALSA Study) project tracked the incidence of physical and cognitive impairment as well as dementia and cardiovascular diseases in elderly Latinos in the Sacramento, California, region. The SALSA project aimed to assess cognitive, physical, and social functions, which include the ability to follow instructions, to perform certain movements, and to interact with others. The study explored the effects that cultural, nutritional, social, and cardiovascular risk factors have on overall health and dementia, and examined the association between diabetes and functional status. This study contains the neuroclinical exam data from the SALSA project. Demographic information includes age given at follow-up visits, country of birth, language, religion, marital status, educational level, occupation, household income, and size of household.

Curated
Simple Crosstabs

Study of Women's Health Across the Nation (SWAN): Baseline Dataset, [United States], 1996-1997 (ICPSR 28762)

Released/updated on: 2019-05-15
Geographic coverage: Detroit, United States, Chicago, California, Oakland, New Jersey, Michigan, Pennsylvania, Illinois, Massachusetts, Los Angeles, Newark, Boston, Pittsburgh
Time period: 1996-01-01--1997-11-30

The Study of Women's Health Across the Nation (SWAN), is a multi-site longitudinal, epidemiologic study designed to examine the health of women during their middle years. The study examines the physical, biological, psychological, and social changes during this transitional period. The goal of SWAN's research is to help scientists, health care providers, and women learn how mid-life experiences affect health and quality of life during aging. The data include questions about doctor visits, medical conditions, medications, treatments, medical procedures, relationships, smoking, and menopause related information such as age at pre-, peri- and post-menopause, self-attitudes, feelings, and common physical problems associated with menopause.

The study is co-sponsored by the National Institute on Aging (NIA), the National Institute of Nursing Research (NINR), the National Institutes of Health (NIH), and the NIH Office of Research on Women's Health. The study began in 1994. Between 1996 and 1997, 3,302 participants joined SWAN through 7 designated research centers. The research centers are located in the following communities: Detroit, MI; Boston, MA; Chicago, IL; Oakland and Los Angeles, CA; Newark, NJ; and Pittsburgh, PA. SWAN participants represent five racial/ethnic groups and a variety of backgrounds and cultures. This is the next phase of data collection after the original collection of the screening data (ICPSR 4368).

Curated
Simple Crosstabs

Study of Women's Health Across the Nation (SWAN): Visit 01 Dataset, [United States], 1997-1999 (ICPSR 29221)

Released/updated on: 2019-05-02
Geographic coverage: Detroit, United States, Chicago, California, Oakland, New Jersey, Michigan, Pennsylvania, Illinois, Massachusetts, Los Angeles, Newark, Boston, Pittsburgh
Time period: 1997-02-01--1999-01-31

The Study of Women's Health Across the Nation (SWAN) is a multi-site longitudinal, epidemiologic study designed to examine the health of women during their middle years. The study examines the physical, biological, psychological, and social changes during this transitional period. The goal of SWAN's research is to help scientists, health care providers and women learn how mid-life experiences affect health and quality of life during aging. The data include questions about doctor visits, medical conditions, medications, treatments, medical procedures, relationships, smoking, and menopause related information such as age at pre-, peri- and post-menopause, self-attitudes, feelings, and common physical problems associated with menopause.

The study is co-sponsored by the National Institute on Aging (NIA), the National Institute of Nursing Research (NINR), the National Institutes of Health (NIH), and the NIH Office of Research on Women's Health. The study began in 1994. Between 1997 and 1999, 2,881 of the 3,302 women that joined SWAN were seen for their first follow-up visit. The research centers are located in the following communities: Detroit, MI; Boston, MA; Chicago, IL; Oakland and Los Angeles, CA; Newark, NJ; and Pittsburgh, PA. SWAN participants represent five racial/ethnic groups and a variety of backgrounds and cultures.

Curated
Simple Crosstabs

Study of Women's Health Across the Nation (SWAN): Visit 03 Dataset, [United States], 1999-2001 (ICPSR 29701)

Released/updated on: 2019-05-29
Geographic coverage: Detroit, United States, Chicago, California, Oakland, New Jersey, Michigan, Pennsylvania, Illinois, Massachusetts, Los Angeles, Newark, Boston, Pittsburgh
Time period: 1999-02-01--2001-01-31

The Study of Women's Health Across the Nation (SWAN), is a multi-site longitudinal, epidemiologic study designed to examine the health of women during their middle years. The study examines the physical, biological, psychological, and social changes during this transitional period. The goal of SWAN's research is to help scientists, health care providers, and women learn how mid-life experiences affect health and quality of life during aging. The data include questions about doctor visits, medical conditions, medications, treatments, medical procedures, relationships, smoking, and menopause related information.

The study is co-sponsored by the National Institute on Aging (NIA), the National Institute of Nursing Research (NINR), the National Institutes of Health (NIH), and the NIH Office of Research on Women's Health. The study began in 1994. Between 1999 and 2001, 2,710 of the 3,302 women that joined SWAN were seen for their third follow-up visit. The research centers are located in the following communities: Detroit, Michigan; Boston, Massachusetts; Chicago, Illinois; Oakland and Los Angeles, California; Newark, New Jersey; and Pittsburgh, Pennsylvania. SWAN participants represent five racial/ethnic groups and a variety of backgrounds and cultures.

Curated
Simple Crosstabs

Survey of Midlife in Japan (MIDJA 2), May-October 2012 (ICPSR 36427)

Released/updated on: 2018-02-19
Geographic coverage: Tokyo, Japan, Global
Time period: 2012-05-01--2012-10-01

In 2008, with funding from the National Institute on Aging (NIA), baseline survey data for the Survey of Midlife in Japan (MIDJA), April-September 2008 were collected from a probability sample of Japanese adults (N=1,027) aged 30 to 79 from the Tokyo metropolitan area (ICPSR 30822). In 2009-2010 biomarker data was obtained from a subset of these cases (ICPSR 34969).

The survey and biomarker measures obtained parallel those in a national longitudinal sample of Americans known as Midlife in the United States or MIDUS (ICPSR 2760: MIDUS 1 and ICPSR 4652: MIDUS 2). The central objective was to compare the Japanese sample (MIDJA) with the United States sample (MIDUS) to test hypotheses about the role of psychosocial factors in the health (broadly defined) of mid- and later-life adults in Japan and the United States.

In 2012, with additional support from NIA, a longitudinal follow-up of the MIDJA sample was completed. The data collection for this second wave (N=657) largely repeated the baseline assessments. The goal of the follow-up wave was to conduct comparisons of longitudinal data available from the Japanese sample (MIDJA) and the United States sample (MIDUS) to test the hypothesis about the role of psychosocial factors in predicting health changes (including biomarkers) in both cultural contexts. Cultural influences on age differences in health and well-being were also of interest.

Demographic and background information included gender, age, education, marital status, household composition, and income.

Curated
Simple Crosstabs

Survey of Midlife in Japan (MIDJA), April-September 2008 (ICPSR 30822)

Released/updated on: 2018-03-09
Geographic coverage: Tokyo, Japan, Global
Time period: 2008-04-01--2008-09-30
The MIDJA study is a probability sample of Japanese adults (N = 1,027) aged 30 to 79 from the Tokyo metropolitan area. Survey data were collected on sociodemographic characteristics (age, gender, marital status, educational status), psychosocial characteristics (e.g., independence/interdependence, personality traits, sense of control, goal orientations, social support, family obligation, social responsibility), mental health (depression, anxiety, well-being, life satisfaction), and physical health (chronic conditions, health symptoms, functional limitations, health behaviors). These measures parallel those in a national longitudinal sample of midlife Americans known as MIDUS (ICPSR 4652: MIDUS II and ICPSR 2760: MIDUS I). The central objective is to compare the Japanese sample (MIDJA) with the United States sample (MIDUS) to test the hypothesis that the construct of interdependence predicts well-being and health in Japan, whereas the construct of independence predicts well-being and health in the United States. Cultural influences on age differences in health and well-being are also of interest.
Curated

Teenage Attitudes and Practices Survey, 1989: [United States] (ICPSR 9786)

Released/updated on: 1994-02-18
Geographic coverage: United States
Time period: 1988-01-01--1989-01-01
In this follow-up to the National Health Interview Survey (NHIS), teenagers were interviewed to obtain information on tobacco use, including measures of prevalence, knowledge and attitudes, and predictors of taking up smoking. Respondents were asked if they smoked or used chewing tobacco or snuff, or had in the past. If so, they were questioned as to when they started, how much they smoked, chewed, or snuffed during the last month, where they bought cigarettes, which brand of cigarettes, chewing tobacco, or snuff they usually bought, how many times they tried to stop these habits, and what was the longest time they stopped smoking cigarettes since they started smoking regularly. Nonsmokers were asked if they thought they might start smoking, if they had experimented with cigarette smoking, if they had ever been offered a cigarette, and how difficult it would be to obtain tobacco if they wanted to. The survey asked respondents if any of their household members, teachers, or friends smoked, if they had heard anything about the health risks of tobacco use on television, radio, or in newspapers or magazines, and if they believed that chewing tobacco or using snuff causes cancer. Attitudes toward tobacco use were also probed with questions such as whether respondents disliked being around people who smoked, whether they believed it was safe to smoke for only a year or two, if they preferred to date people who didn't smoke, if they thought they could stop smoking any time they wanted to, whether they thought their friends approved or disapproved of their smoking, chewing, or snuffing, and if they thought their parents would mind if they smoked when they were older. Respondents were also asked if they believed there was any harm in having an occasional cigarette, and if they believed smoking helps people to relax, to keep down their weight, and to reduce boredom and stress. In addition to questions about tobacco use, the survey queried respondents about their attitudes regarding seat belts, fitness, alcohol, marijuana, drugs in general, school, and diet. They were also asked whether, during the last year, they had been in an accident or physical fight, had been in a car with a drunk driver, or had ridden on a motorcycle, and how often they had trouble going to sleep, felt unhappy or depressed, felt hopeless about the future, felt nervous or tense, or worried too much. Demographic and socioeconomic information provided in the data file includes respondents' race, education, and geographic region, reference persons' race, education, occupation, and marital status, presence of parent(s) or other adult relative in household, family income, and education of the adult.
Curated

Teenage Attitudes and Practices Survey II, 1993: [United States] (ICPSR 6375)

Released/updated on: 1995-01-11
Geographic coverage: United States
In this follow-up to TEENAGE ATTITUDES AND PRACTICES SURVEY, 1989: [UNITED STATES] (ICPSR 9786), a component of the National Health Interview Survey, teenagers were interviewed to obtain specific information on every aspect of tobacco use, including measures of prevalence, knowledge and attitudes, and predictors of taking up smoking. In addition to questions about tobacco use, Teenage Attitudes and Practices Survey II (TAPS II) queried respondents about their attitudes regarding seatbelts, fitness, alcohol, marijuana, drugs in general, school, and diet. They were also asked whether, during the last year, they had been in an accident or physical fight, had been in a car with a drunk driver, or had ridden on a motorcycle. Finally, the respondents were asked about their physical condition and emotional state. Demographic and socioeconomic information provided in the data file includes respondents' race, education, geographic region, occupation, and marital status, as well as presence of parent(s) or other adult relatives in the household, family income, and education of the adults.
Curated
Simple Crosstabs

WHO Study on Global AGEing and Adult Health (SAGE): Wave 0, 2002-2004 (ICPSR 28502)

Released/updated on: 2013-11-15
Geographic coverage: China (Peoples Republic), South Africa, Mexico, Ghana, Global, India, Russia
Time period: 2002-01-01--2004-01-01
The World Health Organization (WHO)'s Study on Global Ageing and Adult Health (SAGE) is a longitudinal follow-up of a cohort of ageing and older adults. SAGE has been built on the experience and standardized instruments of WHO's 2000/2001 Multi-country Survey Study (MCSS) and the 2002/2004 World Health Surveys (WHS). These surveys focused on health and health-related outcomes and their determinants and impacts in nationally representative samples. These data aim to address data gaps on ageing, adult health and well-being in lower and middle income countries, whilst being comparable to surveys conducted in higher income countries (such as the Health and Retirement Study (HRS), English Longitudinal Study of Ageing (ELSA), and the Survey of Health, Ageing and Retirement in Europe (SHARE)). One of the major drivers of this effort has been the lack of comparability of self-reported health status in international health surveys due to systematic biases in reporting, despite using similar instruments and attempts at making questions conceptually equivalent in translation. SAGE uses standard instruments developed over the last decade, a common design and training approach with explicit strategies for making data comparable to cover a wide range of issues that directly and indirectly impact health and well-being. The survey methodology and research design has included a number of methods to address methods for detecting and correcting for systematic reporting biases in health interview surveys, including vignette methodologies, objective performance tests and biomarkers. A number of techniques have also been employed to improve data comparability, including using common definitions of concepts, common methods of data collection and translations, rigorous sample design and post hoc harmonization. The 2002-2004 WHS data from six countries (China, Ghana, India, Mexico, Russia, and South Africa) constitute Wave 0 of WHO's Study on Global Ageing and Adult Health (SAGE). A sample of these respondents were included in the follow-up 2007-2010 SAGE Wave 1 in these six countries, with new respondents added to ensure a nationally representative sample.
Curated
Simple Crosstabs

WHO Study on Global AGEing and Adult Health (SAGE): Wave 1, 2007-2010 (ICPSR 31381)

Released/updated on: 2013-12-20
Geographic coverage: China (Peoples Republic), South Africa, Mexico, Ghana, Global, India, Russia
Time period: 2007-01-01--2010-01-01

The World Health Organization (WHO)'s Study on Global Ageing and Adult Health (SAGE) is a longitudinal follow-up of a cohort of ageing and older adults. SAGE has been built on the experience and standardized instruments of WHO's 2000/2001 Multi-country Survey Study (MCSS) and the 2002/2004 World Health Surveys (WHS).

These surveys focused on health and health-related outcomes and their determinants and impacts in nationally representative samples. These data will address data gaps on ageing, adult health and well-being in lower and middle income countries, whilst being comparable to surveys conducted in higher income countries (such as the United States' Health and Retirement Study (HRS), English Longitudinal Study of Ageing (ELSA), and the Survey of Health, Ageing and Retirement in Europe (SHARE)). One of the major drivers of this effort has been the lack of comparability of self-reported health status in international health surveys due to systematic biases in reporting, despite using similar instruments and attempts at making questions conceptually equivalent in translation. SAGE uses standard instruments developed over the last decade, a common design and training approach with explicit strategies for making data comparable to cover a wide range of issues that directly and indirectly impact health and well-being.

The survey methodology and research design has included a number of methods to address methods for detecting and correcting for systematic reporting biases in health interview surveys, including vignette methodologies, objective performance tests and biomarkers. A number of techniques have also been employed to improve data comparability, including using common definitions of concepts, common methods of data collection and translations, rigorous sample design and post hoc harmonization. The 2007-2010 SAGE Wave 1 data from six countries (China, Ghana, India, Mexico, Russia, and South Africa) is the follow-up survey project to the 2002-2004 WHO data, which constitutes Wave 0 of WHO's Study on Global Ageing and Adult Health (SAGE). A sample of these respondents from SAGE Wave 0 are included in this follow-up 2007-2010 SAGE Wave 1 in the six countries, with new respondents added to ensure a nationally representative sample.