National Comorbidity Survey (NCS) Series

collection: series

Studies

8

Variables

34,614

Publications

2,029

About this Collection

The National Comorbidity Survey (NCS) was mandated by Congress to survey psychiatric disorders in the United States. It was designed to produce data on the prevalence, risk factors, and consequences of psychiatric morbidity and comorbidity. The NCS was the first nationally representative general population survey of the U.S. to administer a structured psychiatric interview and the first large-scale psychiatric epidemiological survey in the U.S. to use DSM-III-R (American Psychiatric Association, 1987) diagnostic criteria.

National Comorbidity Survey: Baseline (NCS-1) was fielded from 1990-1992 with household sample of over 8,000 respondents, including both persons in the noninstitutionalized civilian population and a supplemental sample of students living in campus group housing. The age range of respondents was 15-54. Subsamples also completed the NCS-1 Part II survey and Tobacco Use Supplement. Diagnoses were based on a modified version of the Composite International Diagnostic Interview (the UM-CIDI), which was developed at the University of Michigan for the NCS-1. The NCS-1 data are available as both public-use and restricted-use files. The restricted-use version contains state and county geography codes.

National Comorbidity Survey: Reinterview (NCS-2) was a reinterview in 2001-2002 of over 5,000 respondents from NCS-1. The survey collected information about changes in patterns of mental disorders and substance use disorders and the predictors and consequences of these changes over the ten years between the two surveys. The study also evaluated the effects of primary mental disorders in predicting the onset and course of secondary substance disorders. Interview questions in the NCS-2 Main Survey were customized to each respondent based on previous responses in the Baseline (NCS-1). The NCS-2 data are available as both public-use and restricted-use versions. The current public-use version does not contain all the sections in the restricted-use version. More information is in the Data Collection Notes.

National Comorbidity Survey Replication (NCS-R) was in 2001-2003 with a new national probability sample of 10,000 English-speaking household residents aged 18 years and older in the coterminous United States. NCS-R was conducted in conjunction with NCS-2. The NCS-R was an in-person survey. The goals of the NCS-R were to study trends in a wide range of variables assessed in NCS-1 and to obtain more information about a number of topics either not covered in NCS-1 or covered in less depth. NCS-R expanded questioning includes assessments based on the more recent DSM-IV diagnostics system (American Psychiatric Association, 1994). To access the data, see the Collaborative Psychiatric Epidemiology Surveys (CPES), that joined data from the NCS-R, the National Survey of American Life (NSAL), and the National Latino and Asian American Study (NLAAS). The NCS-R data are available as both public-use and restricted-use files.

National Comorbidity Survey Replication Adolescent Supplement (NCS-A) was a survey of over 10,000 adolescents in 2001-2004. It was carried out in parallel with the NCS-2 and NCS-R. NCS-A used a dual frame design in which one sample was recruited from the NCS-R households and the other from a representative sample of schools in the same communities as the NCS-R households. It was designed to estimate the lifetime-to-date and current prevalence, age-of-onset distributions, course, and comorbidity of DSM-IV disorders in the child and adolescent years of life among adolescents in the United States; to identify risk and protective factors for the onset and persistence of these disorders; to describe patterns and correlates of service use for these disorders; and to lay the groundwork for subsequent follow-up studies that can be used to identify early expressions of adult mental disorders. Information was also collected from a parent or a parent surrogate that focused on five adolescent disorders for which parental reports are important for making diagnoses. NCS-A is only available as a restricted-use file.

Collaborative Psychiatric Epidemiology Surveys (CPES) were initiated in recognition of the need for contemporary, comprehensive epidemiological data regarding the distributions, correlates and risk factors of mental disorders among the general population with special emphasis on minority groups. The primary objective of the CPES was to collect data about the prevalence of mental disorders, impairments associated with these disorders, and their treatment patterns from representative samples of majority and minority adult populations in the United States. Secondary goals were to obtain information about language use and ethnic disparities, support systems, discrimination and assimilation, in order to examine whether and how closely various mental health disorders are linked to social and cultural issues. To this end, CPES joins together three nationally representative surveys: the NATIONAL COMORBIDITY SURVEY REPLICATION (NCS-R), the NATIONAL SURVEY OF AMERICAN LIFE (NSAL), and the NATIONAL LATINO AND ASIAN AMERICAN STUDY (NLAAS).

Studies

8 results
Restricted

National Comorbidity Survey: Reinterview (NCS-2), 2001-2002 [Restricted-Use]

The NCS-2 was a re-interview of 5,001 individuals who participated in the Baseline (NCS-1). The study was conducted a decade after the initial baseline survey. The aim was to collect information about changes in mental disorders, substance use disorders, and the predictors and consequences of these changes over the ten years between the two surveys. The collection contains four major sections: the main survey, demographic data, diagnostic data, and state, county, and tract FIPS data.

In the main survey, respondents were asked about general physical and mental health. Questions focused on a variety of health issues, including limitations caused by respondents' health issues, substance use, childhood health, life-threatening illnesses, chronic conditions, medications taken in the past 12 months, level of functioning and symptoms experienced in the past 30 days, and any services used by the respondents since the (NCS-1). Additional questions focused on mental disorders including depression, bipolar disorder, specific and social phobias, generalized anxiety, intermittent explosive disorder, suicidality, post-traumatic stress disorder, neurasthenia, pre-menstrual dysphoric disorder, attention deficit/hyperactivity disorder, oppositional defiant disorder, conduct disorder, and separation anxiety. Respondents were also asked about their lives in general, with topics including employment, finances, marriage, children, their social lives, and stressful life events experienced in the past 12 months. Additionally, two personality assessments were included consisting of respondents' opinions on whether various true/false statements accurately described their personalities. Another focus of the main survey dealt with substance use and abuse, nonmedical use of prescription drugs, and polysubstance use. Interview questions in the NCS-2 Main Survey were customized to each respondent based on previous responses in the Baseline (NCS-1).

The second part contains demographic and other background information including age, education, employment, household composition, household income, marital status, and region.

The third part focuses on whether respondents met diagnostic criteria for psychological disorders asked about in the main survey.

The fourth part contains respondents' state, county, and tract FIPS data.

Partially restricted

Collaborative Psychiatric Epidemiology Surveys (CPES), 2001-2003 [United States]

The Collaborative Psychiatric Epidemiology Surveys (CPES) were initiated in recognition of the need for contemporary, comprehensive epidemiological data regarding the distributions, correlates and risk factors of mental disorders among the general population with special emphasis on minority groups. The primary objective of the CPES was to collect data about the prevalence of mental disorders, impairments associated with these disorders, and their treatment patterns from representative samples of majority and minority adult populations in the United States. Secondary goals were to obtain information about language use and ethnic disparities, support systems, discrimination and assimilation, in order to examine whether and how closely various mental health disorders are linked to social and cultural issues. To this end, CPES joins together three nationally representative surveys: the NATIONAL COMORBIDITY SURVEY REPLICATION (NCS-R), the NATIONAL SURVEY OF AMERICAN LIFE (NSAL), and the NATIONAL LATINO AND ASIAN AMERICAN STUDY (NLAAS). These surveys collectively provide the first national data with sufficient power to investigate cultural and ethnic influences on mental disorders. In this manner, CPES permits analysts to approach analysis of the combined dataset as though it were a single, nationally representative survey. Each of the CPES surveys has been documented in a comprehensive and flexible manner that promotes cross-survey linking of key data and scientific constructs.
Restricted

National Comorbidity Survey: Adolescent Supplement (NCS-A), [United States], 2001-2004

The National Comorbidity Survey Replication Adolescent Supplement (NCS-A) was designed to estimate the lifetime-to-date and current prevalence, age-of-onset distributions, course, and comorbidity of DSM-IV disorders in the child and adolescent years of life among adolescents in the United States; to identify risk and protective factors for the onset and persistence of these disorders; to describe patterns and correlates of service use for these disorders; and to lay the groundwork for subsequent follow-up studies that can be used to identify early expressions of adult mental disorders.

The core NCS-A interview schedule was an adaptation of the World Health Organization Composite International Diagnostic Interview (CIDI). NCS-A also administered the non-verbal subtest (Matrices subtest) of the Kaufman Brief Intelligence Test (K-BIT).

In addition to interviewing adolescents, information was collected from a parent or a parent surrogate to obtain an additional perspective on the adolescent's mental health and its correlates. Information from parents focused on the five adolescent disorders for which previous methodological research has most consistently shown that parental reports are important for making diagnoses: attention-deficit/hyperactivity disorder, conduct disorder, oppositional defiant disorder, major depressive episode, and dysthymic disorder.

Demographic information collected by NCS-A includes age, citizenship status, country of birth, criminal history, ethnicity, grandparents' country of birth, language(s) spoken in the home, parents' country of birth, race, religion, and sex.

The data collection contains six data files: (1) data for the adolescent household and school respondents; (2) data for the parents who responded to the long self-administered questionnaire; (3) data for the parents who responded to both the long self-administered questionnaire and short telephone interview; (4) diagnostic variables derived from the data collected from the adolescents and parents; (5) K-BIT scores normed to the NCS-A adolescent sample; and (6) raw K-BIT data.

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