PDF codebooks for the Add Health restricted-use data
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| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave I In-Home Interview Data A merged file containing the Wave I In-Home Interview data, Parent Questionnaire data and the Add Health Picture Vocabulary data, collected in 1994–1995. | 2,820 | 20,745 |
| Wave I School Administrator Questionnaire Data Information from the Wave I (self-administered) questionnaires answered by administrators at the sampled schools. | 189 | 172 |
| School Information Data Additional information about the individual schools. | 20 | 172 |
| Wave I In-School Questionnaire Data Adolescent responses to the In-School Questionnaire administered September 1994 through April 1995. | 227 | 90,118 |
| Wave I In-Home Weights Variables needed to correct for design effects and weight the Wave I in-home data. | 4 | 20,745 |
| Wave I School Administrator Weights Variables needed to correct for design effects and weight the Wave I school administrator data. | 3 | 164 |
| Wave I Grand Sample Weights Variables needed to correct for design effects and weight the Wave I in-school data. | 7 | 90,118 |
| Wave II In-Home Interview Data Data collected during the 1996 in-home interview. | 2,540 | 14,738 |
| Wave II School Administrator Questionnaire Data Information from the Wave II (phone-administered) questionnaires answered by administrators at the sampled schools. | 100 | 128 |
| Wave II Grand Sample Weights Variables needed to correct for design effects and weight the Wave II in-home data. | 4 | 14,738 |
| Wave III In-Home Interview Data Respondent-level data collected during the 2001–2002 in-home interview includes field interviewer characteristics, AHPVT. | 1,876 | 15,197 |
| Wave III Grand Sample Weights Variables needed to correct for design effects and weight the Wave III in-home data, including longitudinal and cross-sectional weights. | 5 | 15,197 |
| Wave IV In-Home Interview Data Data collected during the 2008 in-home interview. Includes flow charts for interview sections. | 974 | 15,701 |
| Wave IV Grand Sample Weights Variables needed to correct for design effects and weight the Wave IV in-home data, including longitudinal and cross-sectional weights. | 5 | 15,701 |
| Wave V Mixed-Mode Survey Data Respondent data from the Wave V mixed-mode survey. (Comparable to Wave I-IV In-Home Interview). Includes flow charts for survey sections. This release includes survey, weights, disposition, survey medications and Section 16b data sets. N=12,300 | 909 | 12,300 |
| Wave V Sample 2B Sample S2B is part of the Wave V survey. S2B was administered 2 June 2017-8 July 2018. While most variables were released in December 2019 as Wave V data, two sections were not. These specifically S2B cases are a representative sample (asked of everyone in the sample). Web survey content for the other samples (1, 2A, 3) were edited mid-data collection and not all respondents in each sample had the opportunity to answer the questions. | 163 | 1,101 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave I In-School Friendship Nominations Identification numbers of the friends that the respondent nominated during the in-school interview. | 11 | 90,118 |
| Wave I In-Home Friendship Nominations Identification numbers of the friends that the respondent nominated during the Wave I in-home interview. | 12 | 20,745 |
| Wave II In-Home Friendship Nominations Identification numbers of the friends that the respondent nominated during the Wave II in-home interview. | 11 | 14,738 |
| Wave III Friend IDs Add Health respondents who were in the 7th or 8th grade at Wave I were asked at Wave III to identify, from a list of 10 computer-generated names, which ones were current friends or which ones were their friends when they were in school together. This dataset contains the altered identification numbers (AIDs) of the 10 computer-generated names. | 11 | 3,572 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Adolescent Pairs Data Information that links and describes the sibling pairs identified at the Wave I in-home interview. | 11 | 3,139 |
| Wave III Sibling IDs At Wave III, Add Health respondents were asked questions about their siblings who also participated in the Wave I or II in-home interviews. This dataset contains the AIDs for these siblings. | 10 | 4,368 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave I Contextual Data Community contextual variables based on state, county, tract, and block group levels derived from the Wave I addresses. | 2,682 | 20,745 |
| Wave II Contextual Data Community contextual variables based on state, county, tract, and block group levels derived from the Wave II addresses. | 2,682 | 14,738 |
| Wave III Contextual Data Community contextual variables based on state, county, tract, and block group levels derived from the Wave III addresses. | 594 | 15,197 |
| Wave I Spatial Analysis Data Pseudo coordinates that can be used to calculate distances between friends in a school community. | 4 | 20,301 |
| Wave I Neighborhood Data Pseudo state, county, tract, and block group variables that allow grouping of Add Health respondents geographically (based on Wave I addresses). | 5 | 20,745 |
| Wave II Neighborhood Data Pseudo state, county, tract, and block group variables that allow grouping of Add Health respondents geographically (based on Wave II addresses). | 5 | 14,738 |
| Wave III Grouping File Data Pseudo state, county, tract, and block group variables in FIPS code format that allow grouping of Add Health respondents geographically (based on Wave III addresses). | 2 | 15,197 |
| Wave IV Grouping Data The pseudo FIPS codes in this file allow you to geographically group respondents by their Wave IV locations. | 3 | 15,701 |
| Wave III Census Region This file contains the Census region codes for the respondents’ Wave III residential locations. | 2 | 15,197 |
| Wave IV Census Region This file contains the Census region codes for the respondents’ Wave IV residential locations. | 2 | 15,197 |
| Wave III Supplemental Tract-Level Contextual Data This file contains supplemental Wave III contextual data that include transportation and commuting measures, climate descriptors, amenities, and state-level tobacco control influences. These variables are available at the census tract-level unless otherwise specified. | 35 | 15,197 |
| Wave IV Supplemental Tract-Level Contextual Data This file contains tract-level measures, based on the Wave IV respondent locations, reported by the U.S. Census Bureau’s 2009 American Community Survey (ACS), the Climate Atlas of the United States, the USDA Economics Research Service, Esri Data and Maps, ImpacTeen Tobacco Control policy and Prevalence Data, and the Uniform Crime Reports. When tract level measures were not available or appropriate, state and county level variables were used. | 304 | 15,701 |
| Wave I, II, III Political Context Data The Add Health Political Context files provide an array of measures that describe the political environments in which Add Health respondents reside. These contextual variables include measures of commuting, election results for gubernatorial, presidential, and senatorial races, and voter registration law. | WI: 17 WII: 13 WIII: 4 | WI: 20,745 WII: 14,738 WIII: 15,197 |
| Wave III Sex Ratio Data In this file are constructed variables at the county-level for sex ratios for males to females ages 18 to 29, 30-34, and 18 to 34, the proportion of males and females ages 18 to 34, and the sex ratio of employed males 16 years and older to the total number of females 16 years and older for the white population and the black or African American population. | 11 | 15,197 |
| Wave III Alcohol Outlet Density Data This Add Health data file measures the prevalence of alcohol outlets in respondent communities by reporting the tract-level density of establishments possessing on- and/or off-premise alcohol licenses. | 10 | 15,197 |
| Wave IV Modified Retail Food Environment Index (mRFEI) Data The Wave IV mRFEI data file includes the mRFEI for each respondent based on their Wave IV residential location. | 2 | 15,701 |
| Wave IV Ambient Air Pollutants Data These files include 365 daily exposure estimates of ambient air pollutants (individual pollutants/particulate matter/gases) for each Add Health study participant in Wave IV. | varies by file | varies by file |
| Wave III & IV Sexual Minority Policy Data This database includes indicators of the policy context for sexual minorities (a population typically defined based on co-residence with a same-sex partner or self-identification as gay, lesbian, or bisexual) in Waves III & IV of Add Health. These data will enable researchers to examine how state-level policies in young adulthood are associated with a wide range of indicators of health and well-being among sexual minorities. | WIII: 4 WIV: 4 | WIII: 15,197 WIV: 15,701 |
| Wave IV College Characteristics Data At Wave IV of the Add Health survey, respondents were asked if they had received a bachelor’s degree. This is a degree-level file. College-level data were linked to each degree based on the institution from which the respondent reported receiving each degree. | 40 | 15,810 |
| Wave III & IV College Mobility Data These data were collected from a sample of college students who were born between 1980 and 1982 and who attended a college or university in the early 2000’s. At Wave III of the Add Health survey, respondents were asked if they were currently enrolled in a postsecondary institution. At Wave IV of the Add Health survey, respondents were asked if they had received a bachelor’s degree. Respondents who answered in the affirmative were then asked to report the institution from which they were currently enrolled or received this degree. | WIII: 50 WIV: 52 | WIII: 15,197 WIV: 15,810 |
| Wave I & IV County Health, Mobility, and Tobacco Tax Data The Wave I & IV County Health and Mobility database summarizes the socioeconomic, health, and mobility characteristics of the environments in which Add Health participants were living at the time of their Wave I & IV interview. These variables are available at the county or state level. Wave I – N: 20,745 and Wave IV – N: 15,701 | WI: 45 WIV:111 | WI: 20,745 WIV: 15,701 |
| Wave II & III Tobacco Tax Data Wave II & III Tobacco Tax Data file supplements the County Health and Mobility database available for Waves I & IV. Comprehensively, these data files provide tobacco tax for Add Health respondent state of residence from Wave I to Wave IV. Wave II – N: 14,738 and Wave III – N: 15,197 | WII: 2 WIII: 2 | WII: 14,738 WIII: 15,197 |
| Wave I, III & IV Sunset Data These data present average sunset time over the course of the year for the respondent’s Census block group. Users can input latitude and longitude coordinates and time zone information to retrieve the sunset time (along with other solar and lunar information) for any date between 1700 and 2100. | WI: 2 WIII: 2 WIV: 2 | WI: 20,745 WIII: 15,197 WIV: 15,701 |
| Wave I, II, III, IV & V Grouping Data These location identifiers are based on 2010 Census geographic boundaries and are longitudinally consistent across all waves. Previous Add Health waves released location identifiers based on the most recent Census for that wave, and are therefore not comparable through time. These identifiers are based on Census block group FIPS codes. | 6 | 20,745 |
| HUD-Assisted Housing Supplementary Data The supplementary datafile identifies Add Health respondents who lived in HUD-assisted housing at any point between 1995 and 2017. For these Add Health respondents, the supplementary datafile provides unique Add Health respondent identifiers (AID) and household-level information about the characteristics of their HUD housing residence. The supplementary datafile is a hierarchical (i.e., long-format data file), with each row representing a unique HUD administrative record that is linked to an AID. In total, the hierarchical file includes a total of 8,587 HUD records on 1,159 unique Add Health respondents identified through the linkage. | 8 | 8587 |
| Wave I State Demographic Characteristics, Exclusionary Indices, and Inclusionary Indices These data provide measures of punishment regime variation in state-based policies, practices, and programs, both in their punitive and non-punitive forms, and some additional state demographic control variables. These data were gathered to use with Add Health for multilevel analyses. | 25 | 20,745 |
| Contextual Wave IV Database The data provide an important update to the contextual variables already available in Wave IV by including information at the state- and county-levels. Additionally, there are a few new variables in the present database that are absent from other waves. | 270 | 15,701 |
| Contextual Wave V Database This contextual database further expands the extensive contextual data currently available to users of the National Longitudinal Study of Adolescent to Adult Health (Add Health) through the provision of numerous measures reported by the U.S. Census Bureau’s American Community Survey (ACS), rural-urban commuting area codes, U.S. Climate Atlas, and Uniform Crime Report. | 541 | 12,300 |
| Wave V County Health and Mobility Data The Wave V County Health and Mobility database summarizes the socioeconomic, health, and mobility characteristics of the environments in which Add Health participants were living at the time of their Wave V interview. County-level data describe (1) levels of and trends in chronic disease (hypertension, type-2 diabetes) and health risk behaviors (obesity, smoking, alcohol use); and (2) economic opportunity and inequality. | 105 | 12,300 |
| Wave V – ACA Medicaid Expansion Data This data file provides the year in which states expanded Medicaid under the Affordable Care Act. These dates are attached to the location in which Add Health participants were living at Wave V. | 2 | 12,300 |
| Waves I, IV, and V – The Opportunity Atlas: Mapping the Childhood Roots of Social Mobility Data This file enhances the existing Add Health contextual database through the addition of measures essential to understanding the determinants and sequelae of socioeconomic mobility. Specifically, it aims to characterize the socioeconomic mobility of Add Health participants at Wave I, IV, and V. | WI: 211 WIV: 211 WV: 211 | WI: 20,745 WIV: 15,701 WV: 12,300 |
| Wave IV City Crime Rate Data This Crime Rate Data file facilitates research examining the impact of community violence on the health trajectories of Wave IV Add Health participants by providing police department crime data from 13 U.S. cities with high crime rates. | 10 | 15,701 |
| Wave V City Crime Rate Data This Crime Rate Data file facilitates research examining the impact of community violence on the health trajectories of Wave V Add Health participants by providing police department crime data from 13 U.S. cities with high crime rates. | 10 | 12,300 |
| Historical Neighborhood Redlining This contextual database allows researchers to identify potential long-term consequences of redlining for contemporary inequities in neighborhood environments, and individual health and socioeconomic attainment over the life course. | 9 | 20,706 |
| Waves III-V Multi-year Air Pollution Exposure Estimates The air pollution data described here provide longer-term estimates of air pollution exposure that can be used to address a broad range of research questions related to how air pollution exposure over time may relate to a variety of health outcomes. | 33 | 20,745 |
| Wave I & II School Desegregation Disparities This file contains data on the levels of school racial segregation experienced by Add Health respondents during their school-age years, related school district characteristics, and measures of tract-level residential segregation present in adulthood (Waves III-V). | 37 | 84,166 |
| Wave I & II School District Grouping Data To facilitate clustering by school district, the school district identifiers comprising this file are based on the Local education agency identification numbers (LEAID) of the school districts in which the Wave I school, Wave I residence, and Wave II residence were situated. The first two characters of this LEAID represent state and reflect state codes assigned by Add Health in other disseminated data similarly intended for clustering at different geographic areas. | 4 | 84,166 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave III ASHA Call Data To receive the results of their STD assays, Wave III respondents called an Add Health dedicated number at the American Social Health Association. This dataset provides information on who called the results hotline and the date and time of the call. | 75 | 4,279 |
| Wave III BEM Scores Data The masculinity and femininity raw and standard scores from the 30 item short form BEM Sex-Role Inventory are available in this file. | 5 | 15,197 |
| Wave III Mentor Data For Wave III respondents who reported having a mentor, the open-ended responses to the question “How did {HE/SHE} help you?” have been coded and are available in this file. | 17 | 15,197 |
| DESCRIPTION | FILES | OBSERVATIONS |
|---|---|---|
| Wave III Academic Courses These files contain academic status and/or performance indicators for math, science, foreign language, English, history, social sciences, physical education, and a combined overall category. | 6 | 12,237 |
| Wave III Academic Networks The Network files provide information on social networks based on the respondents’ course-taking patterns. | 3 | varies by file |
| Wave III Context School level contextual data are from the Common Core of Data (CCD), Private School Survey (PSS), the1990 and 2000 Census, and the Office of Civil Rights. | 6 | varies by file |
| Wave III Course-Level The data in this file are needed for merging the course-level curriculum data with other Education Files. | 1 | 516,146 |
| Wave III Curriculum These math and science curriculum data are derived from coding the textbooks schools reported using for each course offered in these two subjects. | 8 | varies by file |
| Wave III Linking This file contains variables designed to link transcript data to academic or school years and to Add Health. | 1 | 12,237 |
| Wave III Primary The Primary Component contains several types of indicators based on information collected from participating schools and listed directly on student transcripts such as student exit or graduation status and materials gathered from schools during the data collection process. | 5 | varies by file |
| Wave III Transition This file contains variables explaining the respondents’ movement through the educational system. | 1 | 12,217 |
| Wave III Weights Files contain weights for the education data along with the school weights needed for HLM analysis. | 2 | varies by file |
| Wave III Academic Transcript Social Studies and Civic Coursework (ATRCVC) Data The Wave III ATRCVC data is a course-by-student-level file that includes academic transcript data related to social studies and civic coursework. | 9 | 93,651 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave I In-Home Weight Components A weight component for each level of sampling (school and adolescents) has been created for each wave of data collection. This file contains the weight components needed for computing multilevel weights for Wave I. | 5 | 20,745 |
| Wave II In-Home Weight Components A weight component for each level of sampling (school and adolescents) has been created for each wave of data collection. This file contains the weight components needed for computing multilevel weights for Wave II. | 5 | 20,745 |
| Wave III In-Home Weight Components A weight component for each level of sampling (school and adolescents) has been created for each wave of data collection. This file contains the weight components needed for computing multilevel weights for Wave III. | 6 | 15,197 |
| Wave IV Weight Components A weight component for each level of sampling (school and adolescents) has been created for each wave of data collection. This file contains the weight components needed for computing multilevel weights for Wave IV. | 6 | 15,701 |
| In-School Weight Components A weight component for each level of sampling (school and adolescents) has been created for each wave of data collection. This file contains the weight components needed for computing multilevel weights. | 8 | 90,118 |
| Add Health School Weights The initial weights for the school are in this file. | 2 | 132 |
| Wave V Mixed-Mode Weights The Wave V Mixed-Mode Weights were released with the Wave V Mixed-Mode Survey. |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave I School Network Data Network variables constructed from the in-school questionnaire data and friendship nominations. | 440 | 75,871 |
| Wave V Disposition FileDESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave I and II Disposition File This file contains the types of data available for the Wave I respondents along with the outcome of the 16,706 respondents selected for Wave II. | 9 | 20,745 |
| Wave III Disposition File This file contains the final outcome of the 20,058 cases fielded at Wave III. | 3 | 20,058 |
| Wave IV Disposition File This file contains the final outcome of the 19,962 cases fielded at Wave IV. | 2 | 19,962 |
| National Death Index File This file contains the underlying cause of death and days alive after Wave I interview. | 3 | 227 |
| Wave V Disposition File The Wave V Disposition file was released with the Wave V Mixed-Mode Survey Data. |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Overview of ONE Files This file contains an overview of the Obesity and Neighborhood Environment (ONE) data. Codebooks for each specific topic are found below. Data are available on: climate, street connectivity, crime, geocode source, land cover, parks, physical activity resources, urban distances, weather, population density, school distances measures, FIPS code grouping, mobility, MSA pseudo codes, cost of living, employment, length of day, road type length, and rural-urban commuting characteristics. | ||
| Wave I and III ACCRA Data These data files report ACCRA Cost of Living Index data for Wave I and Wave III based on respondent location and the year and quarter of the Add Health interview. | WI: 38 WII: 79 | WI: 20,745 WII: 15,197 |
| Wave I and III Climate Files This file contains the climate data for Wave I and III respondents based on the nearest climate station. Information is available on precipitation, total snowfall, sky cover, temperature, and total hours of sunshine. | WI: 25 WIII: 25 | WI: 20,745 WIII: 15,197 |
| Wave I and III Crime Files The county-level crime data in these files are based on the Wave I and III respondent locations. | WI: 8 WIII: 8 | WI: 20,745 WIII: 15,197 |
| Wave I and III Employment Files Certain county-level employment data from the U.S. Bureau of Labor Statistics are attached to Wave I and Wave III respondent locations. | WI: 47 WIII: 36 | WI: 20,745 WIII: 15,197 |
| Wave I and III Geocode Source The data source of the Wave I and III respondent residential geocodes (latitude and longitude) are provided in these files. | WI: 2 WIII: 2 | WI: 20,745 WIII: 15,197 |
| Wave I and III Land Cover Data These files contain land cover metrics within 1, 3, 5, and 8.05 km (5 miles) of Wave I and III respondent locations. | WI: 237 WIII: 237 | WI: 20,745 WIII: 15,197 |
| Wave I and III Length of Day These data files contain the number of hours of daylight at each Wave I and Wave III respondent location based on that respondent’s latitude and survey date. | WI: 2 WIII: 2 | WI: 20,745 WIII: 15,197 |
| Wave I and III Parks Data The counts of public parks within a Euclidean distance of 1, 3, 5, and 8.05 kilometers (5 miles) of each respondent at Wave I and III are in these files. | WI: 43 WIII: 43 | WI: 20,745 WIII: 15,197 |
| Wave I and III Population Density Data The Wave I population density file contains the proportion of 1990 U.S. Census block group population and are (in square meters) within 1, 3, 5, and 8.04672 km (5 mi) of each Wave I respondent. The Wave III population density file contains the proportion of 2000 U.S. Census block group population and area (in square meters) within 1, 3, 5, and 8.04672 km (5 mi) of each Wave III respondent. | WI: 9 WIII: 9 | WI: 20,745 WIII: 15,197 |
| Wave I and III Resources Data These Add Health files provide data on the presence of various physical activity (PA) resources situated near respondent residences at Wave I and III. | WI: 749 WIII: 3741 | WI: 20,745 WIII: 15,197 |
| Wave I and III Road Type Length Data Road type length calculations within radii of 1, 3, 5, and 8.05 kilometers (5 miles) of Wave I and Wave III respondent locations. | WI: 53 WII: 53 | WI: 20,745 WIII: 15,197 |
| Wave I and III Rural-Urban Commuting Area (RUCA) Codes These data files define the rural-urban commuting characteristics of Wave I and Wave III respondent locations at the U.S. Census tract-level using the 1990 and 2000 RUCA codes developed by the U.S. department of Agriculture’s Economic Research Service. | WI: 3 WIII: 2 | WI: 20,745 WIII: 15,197 |
| Wave I and III Street Connectivity Files These files contain road network connectivity measures within 1, 3, 5, and 8.05 km (5 miles) of the Wave I and III respondent locations. | WI: 57 WIII: 57 | WI: 20,745 WIII: 15,197 |
| Wave I and III Urban Distances Contains Euclidean distances to both 1990 and 2000 U.S. Census Urbanized Areas (UAs) for each Wave I respondent. Contains the Euclidean distance to 2000 U.S. Census Bureau-defined urbanized areas (UAs) for each Wave III respondent. | WI: 3 WIII: 2 | WI: 20,745 WIII: 15,197 |
| Wave I and III Weather Data This file contains weather data for Wave I and III respondents based on the nearest weather station reporting data for the corresponding survey month and year. | WI: 8 WIII: 8 | WI: 20,745 WIII: 15,197 |
| Wave I Grouping File This file is for use with the Obesity and Neighborhood Environment (ONE) data only. It is based on recoded Wave I addresses and contains pseudo state, county, tract, and block group variables in FIPS code format that allow for grouping of Add Health respondents geographically. | 3 | 20,745 |
| Wave I School Distance Measures This file contains the distance between the geocoded point locations of each respondent’s Wave I location and that respondent’s school. | 2 | 20,745 |
| Wave III Mobility Data Reports the distance between each respondent’s geocoded point location for each survey wave and that respondent’s school location, along with the respondent’s move distance between each survey wave. | 7 | 20,745 |
| Wave III MSA Pseudo Codes The MSA pseudo code created for each respondent’s Wave III location is in this file. | 2 | 15,197 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave III Cotinine Assay Data This file contains the cotinine and 3-hydroxycotinine assay values for 963 Wave III respondents. | 5 | 963 |
| Wave III HPV-MGEN Assay Data Assay results for human papillomavirus and mycoplasma genitalium are available for a subset of the Wave III respondents who provided a urine sample. | 46 | 5,126 |
| Wave III HPV-MGEN Assay Weights Sample weights for respondents with HPV and MGEN assay results are in this file. | 5 | 14,322 |
| Wave III Urinalysis Data This file contains nitrate, specific gravity, pH level, white blood cells, protein, glucose, ketone, urobilinogen, bilirubin, microalbumin, urine creatinine, and blood values from the Wave III urine specimens. | 16 | 15,197 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave IV Medication File Data This file provides the therapeutic classification codes for the medications reported at Wave IV. | 6 | 10,711 |
| Wave IV Glucose – HbA1c This file contains two measures of glucose homeostasis based on the assay of the Wave IV dried blood spots. | 10 | 15,701 |
| Wave IV CRP-EBV The results of the assays for CRP (C-reactive protein) and EBV (Epstein-Barr virus) are in this data file. | 16 | 15,701 |
| Wave IV Lipids This file contains constructed measures designed to facilitate analysis and interpretation of lipids results. | 14 | 15,701 |
| Wave IV Baroreceptor Sensitivity This file contains constructed measures for baroreflex sensitivity, heart rate recovery, and systolic blood pressure recovery for the Wave IV respondents. | 4 | 15,701 |
| Wave IV Narcotic Drug Flag This file contains a flag that identifies Wave IV respondents who report taking a medication that contains a narcotic. | 2 | 15,701 |
| Wave IV Consent This file contains variables indicating the types of consent (archive, no archive, refused, incarcerated) obtained for the Wave IV blood spot and saliva DNA collections. | 3 | 15,701 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave V Demographics – Home Exam This file contains various demographic variables in regards to the Wave V home exam, including the date of the home exam, number of days between the Wave V survey and the home exam, the home exam completion status, as well as the respondent’s age, biological sex, pregnancy status, medication use and blood draw status. | 12 | 5,381 |
| Wave V Anthropometrics This file contains anthropometric variables constructed from the measurements taken at the Wave V Home Exam. The measurements include arm circumference, height, weight and waist circumference. The file also contains BMI, as well as classification variables for BMI and waist circumference. | 13 | 5,381 |
| Wave V Cardiovascular Measures This file contains cardiovascular measures constructed from the three serial measurements of blood pressure and pulse rate collected at the Wave V Home Exam. The measures include systolic and diastolic blood pressure, pulse rate, pulse pressure and mean arterial pressure. Other variables included in the file are two classifications of blood pressure, flags based on self-reported medical history, an antihypertensive medication flag and a joint classification variable. | 31 | 5,381 |
| Wave V Medications-Home Exam This file provides the therapeutic classification codes, as well as numerous medication flag variables, to identify the types of medications taken by respondents for medications (both prescription and over-the-counter) reported at the Wave V Home Exam. | 35 | 11,105 |
| Wave V Glucose Homeostasis This file contains assay results of glucose and hemoglobin A1c (HbA1c) based on venous blood collected via phlebotomy at the Wave V home exam. There are classifications for fasting glucose and non-fasting glucose, as well as an HbA1C classification. Other variables included are flags based on a self-reported diabetes medical history, anti-diabetic medication use, and a diabetes joint classification variable. | 11 | 5,381 |
| Wave V Lipids This file contains constructed measures designed to facilitate analysis and interpretation of lipids results based on venous blood collected via phlebotomy at the Wave V home exam. In addition to the lipid assay results, there are classifications according to both the NCEP/ATP III and AHA/ACC guidelines, a flag for antihyperlipidemic medication use, and two hyperlipidemia joint classification variables. | 26 | 5,381 |
| Wave V Renal Function This file contains constructed measures designed to facilitate analysis and interpretation of renal function based on venous blood collected via phlebotomy at the Wave V home exam. Assay results for creatinine and cystatin-c are available, as well as three different estimations of the glomerular filtration rate (GFR) using either the creatinine concentration, the cystatin C concentration or both concentrations. Classifications according to both clinical and KDIGO guidelines are available as well. | 14 | 5,381 |
| Wave V Inflammation and Immune Function This file contains constructed measures designed to facilitate analysis and interpretation of inflammation and immune function based on venous blood collected via phlebotomy at the Wave V home exam. In addition to the assay results for high sensitivity C-reactive protein (hsCRP), there is an AHA/CDC classification, counts of subclinical symptoms and common infectious or inflammatory diseases, and various anti-inflammatory medication use flags. | 26 | 5,381 |
| Wave V Biomarker Weight This file contains the Wave V biomarker sample weight. | 2 | 5,381 |
| Wave V Hepatic Injury This file contains constructed measures designed to facilitate analysis and interpretation of hepatic injury based on venous blood collected via phlebotomy at the Wave V home exam. Assay results for aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are available, as well as three semi-quantitative serum index assays – lipemia, hemolysis and icterus – to evaluate the possibility of interference with the AST or ALT assays. Moreover, two constructed measures are available – the AST/ALT ratio and its classification. | 10 | 5,381 |
| Wave V Renal Function Addendum This file contains constructed measures designed to facilitate analysis and interpretation of renal function based on venous blood collected via phlebotomy at the Wave V home exam. Updated estimations of the glomerular filtration rate (GFR) based on 2021 guidelines are available using either the creatinine concentration or using both the creatinine and cystatin C concentrations. The estimations of GFR have been calculated according to the 2021 NIDDK CKD-EPI guidelines. Classifications of the new estimations according to both clinical and KDIGO guidelines are available as well. | 7 | 5,381 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Individual Vital Status and Underlying Cause of Death File, 2019 This file contains one record for each of the 20,745 Add Health sample members from Wave I. It provides the vital status of each sample member as well as the National Death Index-provided underlying cause of death code in ICD-10 format for each decedent. The month and year of the most recent Add Health interview are provided for living sample members, while the month and year of death are provided for decedents. | 12 | 20,745 |
| Ordered Cause of Death File, 2019 This file contains entity- and record-axis codes reported by the National Death Index (NDI) for each decedent in the Add Health sample. The file is arranged hierarchically, by axis code; therefore, each decedent may have multiple records depending on the maximum number of entity- and record-axis codes recorded by NDI. The sequence of the decedent’s records reflects the order in which the entity- and record-axis codes were reported in the NDI record. | 7 | 1,745 |
| All Coded Causes of Death File, Including Entity-Axis Codes, 2019 This file contains all underlying cause of death and entity-axis codes appearing in the National Death Index (NDI) source file. Functioning as dummy variables, zero represents the absence of a code on the decedent’s death certificate, while one denotes the presence of one. | 88 | 540 |
| All Coded Causes of Death File, Including Record-Axis Codes, 2019 This file contains all underlying cause of death and record-axis codes appearing in the National Death Index (NDI) source file. Functioning as dummy variables, zero represents the absence of a code on the decedent’s death certificate, while one denotes the presence of one. | 83 | 540 |
| Individual Vital Status and Underlying Cause of Death File, 2021 This file contains one record for each of the 20,745 Add Health sample members from Wave I. It provides the vital status of each sample member through 2021 as well as the National Death Index-provided underlying cause of death code in ICD-10 format for each decedent. The month and year of the most recent Add Health interview are provided for living sample members, while the month and year of death are provided for decedents. N=20,745 | 12 | 20,745 |
| Ordered Cause of Death File, 2021 This file contains entity- and record-axis codes reported by the National Death Index (NDI) for each decedent in the Add Health sample through 2021. The file is arranged hierarchically, by axis code; therefore, each decedent may have multiple records depending on the maximum number of entity- and record-axis codes recorded by NDI. The sequence of the decedent’s records reflects the order in which the entity- and record-axis codes were reported in the NDI record. N=2,123 | 7 | 2,123 |
| All Coded Causes of Death File, Including Entity-Axis Codes, 2021 This file contains all underlying cause of death and entity-axis codes appearing in the National Death Index (NDI) source file through 2021. Functioning as dummy variables, zero represents the absence of a code on the decedent’s death certificate, while one denotes the presence of one. N=647 | 96 | 647 |
| All Coded Causes of Death File, Including Record-Axis Codes, 2021 This file contains all underlying cause of death and record-axis codes appearing in the National Death Index (NDI) source file through 2021. Functioning as dummy variables, zero represents the absence of a code on the decedent’s death certificate, while one denotes the presence of one. N=647 | 97 | 647 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave IV Genetic Risk Score* – BMI This file contains the BMI genetic risk score* for Add Health twin and full sibling respondents who provided saliva samples at Wave IV. *Polygenic Score | 2 | 1,886 |
| Wave IV Genetic Risk Score* – Education An education genetic risk score* (GRS_EDU) is available for Add Health twin and full sibling respondents who provided saliva samples at Wave IV. This variable is the weighted sum of risk alleles identified in the Rietveld et al. (2013) genome-wide association study. *Polygenic Score | 3 | 1,886 |
| Wave III DNA Data Twin and full siblings interviewed at Wave III were asked to provide saliva samples for DNA analysis. This file contains the genotype values for DAT1 (dopamine transporter), DRD4 (dopamine receptor), and SLC6A4 (serotonin transporter), MAOA_V (monoamine oxidase A-uVNTR), DRD2 (dopamine D2 receptor), and CYP2A6 (cytochrome P450 2A6) from these samples. Also included are values for the following SNPs: rs2304297, rs892413, rs4950, rs13280604. | 24 | 2,574 |
| Wave IV DNA Data Contains genotyping results for all Wave IV respondents who agreed to provide a saliva sample for DNA testing. This dataset has values for DAT1 (dopamine transporter), DRD4 (dopamine receptor), MAOA (monoamine oxidase A-uVNTR), 5HTTLPR (serotonin transporter), HTTLPR La-Lg-S, triallelic activity bins for the serotonin transporter 5HTTLPR adjusted for rs25531, DRD2, s000005, s000006, DRD5, and MAOCA1 | 30 | 15,701 |
| Wave IV Polygenic Scores – Release 1 Thirty constructed polygenic scores (PGS) are available for Add Health respondents who provided archival saliva samples for genetic testing at Wave IV. Scores are available for coronary artery disease, myocardial infarction, plasma cortisol, LDL cholesterol, HDL cholesterol, total cholesterol, triglycerides, type II diabetes (2 measures), BMI, waist circumference, waist-to-hip ratio, height, age at menarche, age at menopause, number of children, age at first birth, ever/current smoker, number of cigarettes per day, extraversion, attention deficit disorder (2 measures), bipolar disorder, major depressive disorder (2 measures), schizophrenia, mental health cross disorder, Alzheimer’s disease, and educational attainment (2 measures). | 53 | 9,129 |
| Wave IV Polygenic Scores – Release 2 Seventy-four constructed polygenic scores (PGSs) are available for Add Health respondents who provided archival saliva samples for genetic testing at Wave IV. Scores are available for various anthropomorphic, health, and behavioral outcomes. See the documentation for a list of all PGSs. | 121 | 9,130 |
| Wave IV Polygenic Scores – SSGAC Polygenic scores (PGS) constructed by the Social Science Genetic Association Consortium (SSGAC) are available for Add Health respondents who provided archival saliva samples for genetic testing at Wave IV. This data file contains educational attainment, cognitive performance, depression, neuroticism, and subjective well-being scores based on standard GWAS summary statistics and multilevel analysis (2 scores for each construct). Additional multivariate analysis scores for highest level math taken and math ability are also included. | 23 | 5,690 |
| Wave IV PGS Risk-Tolerance Contains polygenic scores for general risk tolerance, adventurousness and risky behaviors in the driving, drinking, smoking and sexual domains. Polygenic scores were created for unrelated, Add Health participants of European Ancestry. Score metrics were generated using Plink, LDPred or MTAG software using the UK Biobank GWAS study. | 13 | 4,755 |
| Polygenic Index Inventories Polygenic scores computed by the SSGAC consortium for anthropometric traits, cognition/education, fertility/sexual development, health/health behaviors, and personality/well being. | 92 | 5,689 |
| Polygenic Index Inventories – Release 2 This data file is a 2022 update of the polygenic scores computed by the SSGAC consortium for anthropometric traits, cognition/education, fertility/sexual development, health/health behaviors, and personality/well being. | 92 | 5,689 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave IV dbGaP GWAS Sample Weight A weight component for the dbGaP GWAS Sample. This dataset is only needed if you have been approved to use the dbGaP data. For more information can be found on the CPC Data Portal. | 2 | 9,975 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Wave I-II: Family Structure Array Nineteen constructed family structure array variables are available for Add Health respondents (Wave I or II) from birth to age at latest adolescent follow-up, with a maximum age of 18 years old. The family structure array variables can be used to construct measures such as the number of family structure changes experienced from birth to a given age (family instability), or the amount of time spent in different family structures. | 19 | 20,745 |
| Family Structure This file contains four variables, utilizing five, seven, eight, and fourteen categories, to describe the household parental structure at Wave I. The following citation should be used for papers and publications using this data: Harris, K. M. 1999. The Health Status and Risk Behavior of Adolescents in Immigrant Families. In Hernandez, D.J. (Ed.), Children of Immigrants: Health, Adjustment, and Public Assistance (pp. 286-347). Washington, D.C.: National Academy Press. | 4 | 20,745 |
| Race Included in this file are a single race variable and a multiracial variable constructed from the Wave I race questions. The following citation should be used for papers and publications using this data: Udry, J.R., Li, R.M., & Hendrickson-Smith, J. 2003. Health and Behavior Risks of Adolescents with Mixed-Race Identity. American Journal of Public Health, 93(11), 1865-1870. | 4 | 20,246 |
| Wave IV Constructed Variables This file contains constructed variables on stress, depression, mastery, personality, arrest history, sexual behavior, smoking, and substance abuse created by Wave IV collaborators. | 49 | 15,701 |
| Constructed SES Variables These data include variables for social origins measured from information about their families collected from Add Health participants’ parents at the Wave I interview, social attainments measured from their occupations reported on the Wave IV survey, and neighborhood-level socioeconomic disadvantage using Census-tract-level data linked to Add Health participants’ addresses from Wave I and Wave IV. | 5 | 20,745 |
| Wave IV Constructed Current Relationship Status This dataset contains variables that describe the current relationship each respondent had by Wave IV. | 3 | 15,701 |
| Wave V Constructed Age The Wave V survey did not ask respondent age though it is possible to calculate age using interview date and date of birth. For deductive disclosure reasons complete interview dates and dates of birth were collected but not released. To provide calculated ages two variables have been constructed based on complete interview dates and date of birth month/year and 15 as a universal assigned day of birth. | 3 | 12,300 |
| Wave V Mover Distance The dataset provides the distance, in meters, between each respondent’s home residence in each of the previous waves and their Wave V residence. | 6 | 12,300 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Waves I and II Romantic/Friend Nominations These files contain the identification numbers to link the Wave I and II romantic, non-romantic, and friend data from the Wave I and II in-home interview. N varies by file. | varies by file | varies by file |
| Wave III Partner In-home In Wave III, 1,507 partners of Add Health respondents were interviewed. These files contain the partner data for the Wave III in-home interview, AHPVT, field interviewer characteristics, and links to the Add Health respondents. N= 1,507 | 2 | 1507 |
| Wave III Partner ASHA Call To receive the results of their STD assays, partners of Wave III respondents called an Add Health dedicated number at the American Social Health Association. This file provides information on who called the results hotline and the date and time of the call. N=332 | 75 | 332 |
| Wave III Partner Urinalysis This file contains nitrate, specific gravity, pH level, white blood cells, protein, glucose, ketone, urobilinogen, bilirubin, and blood values from the Wave III partner urine specimens. N=1,507 | 13 | 1507 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Parents (2015-2017) The parent data files contain social, demographic, behavioral, and health data collected in 2015-2017 on a probability sample of Add Health parents who were originally interviewed in 1995 and coincide with Wave V of Add Health. Data for 2,013 Wave I parents, connected to 2,244 Add Health respondents, are available. Additionally, 988 current spouse/partner interviews are available. These data can be linked with Wave I parent data, and corresponding Add Health respondents at Waves I – V. Includes weight files. | varies by file | varies by file |
| Parents (2015-2017) – Family Health History These two files contain data from the Wave I parent and spouse/partner who returned the Parents Phase 2 family health history leave-behind forms. | fhhp2: 131 fhhsp2: 131 | fhhp2: 2,244 fhhsp2: 1,116 |
| Parents (2015-2017) – Disposition File This file contains the final disposition codes for Wave I parents selected for the Parents Phase 2 interview. | 4 | 20,745 |
| Parents (2015-2017) – National Death Index File This file contains the underlying cause of death and days alive after the Wave I interview for Wave I parents selected for the Parents Phase 2 interview who are coded as deceased in the disposition file. | 5 | 226 |
| Parents (2015-2017) – Medication Files These files contain the therapeutic classifications for medication data collected from the Wave I Parent and Spouse/Parent. | p2meds: 7 sp2meds: 7 | p2meds: 1,286 sp2meds: 260 |
| Parents (1995) Data for the 1995 parents are combined with the Wave I data file. In this file are data on 17,669 parents. | 353 | 17,669 |
| DESCRIPTION | VARIABLES | OBSERVATIONS |
|---|---|---|
| Sexual Orientation/Gender Identity, Socioeconomic Status, and Health across the Life Course (SOGI-SES) This file contains new survey data to support exploration of the relationships among sexual orientation, gender identity, gender expression, romantic and sexual behaviors, socioeconomic status, and health. It contains social, demographic, behavioral, and health data collected in 2020-2021 on a sample of Add Health Wave V participants. | 1,178 | 2,614 |
| Sexual Orientation/Gender Identity, Socioeconomic Status, and Health across the Life Course (SOGI-SES) – Sensitive This file contains the SOGI-SES study’s sensitive data variables related to gender identity, in vitro fertilization, and HIV status. | 142 | 2,614 |
| FILE NAME | DESCRIPTION | FILE SIZE (BYTES) |
NO. OF PAGES |
|---|---|---|---|
| Wave I Indexes of Questions and Variables These four indexes list all the questions and variable names in each instrument in Wave I. |
|||
| schadndx.zip | School Administrator Index: List of questions and variable names from the Wave I School Administrator Questionnaire | 19,812 | 6 |
| schndx.zip | Adolescent In-School Index: List of questions and variable names from the Adolescent In-School Questionnaire | 19,842 | 6 |
| pqndx.zip | Parent In-Home Index: List of questions and variables from the Parent In-Home Questionnaire | 33,343 | 12 |
| wave1ndx.zip | In-Home Index: List of questions and variable names from the Wave I Adolescent In-Home Interview | 221,729 | 85 |
| Wave II Indexes of Questions and Variables These two indexes list all the questions and variable names in each instrument in Wave II. |
|||
| adm2ndx.zip | School Administrator Index: List of questions and variable names from the Wave II School Administrator Questionnaire | 11,308 | 3 |
| wave2ndx.zip | In-Home Index: List of questions and variable names from the Wave II Adolescent In-Home Interview | 257,762 | 79 |
| Wave III Index of Questions and Variables | |||
| wave3ndx.zip | List of questions and variable names from the Wave III young adult interview | 243KB | 62 |
| Wave IV Index of Questions and Variables | |||
| wave4ndx.zip | List of questions and variable names from the Wave IV interview | 315KB | 28 |
| Wave V Index of Questions and Variables | |||
| wave5ndx.zip | List of questions and variable names from the Wave V mixed-mode survey | 477KB | 46 |