Codebooks

PDF codebooks for the Add Health restricted-use data

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DESCRIPTIONVARIABLESOBSERVATIONS
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.
2,82020,745
Wave I School Administrator Questionnaire Data
Information from the Wave I (self-administered) questionnaires answered by administrators at the sampled schools. 
189172
School Information Data
Additional information about the individual schools.
20172
Wave I In-School Questionnaire Data
Adolescent responses to the In-School Questionnaire administered September 1994 through April 1995.
22790,118
Wave I In-Home Weights
Variables needed to correct for design effects and weight the Wave I in-home data.
420,745
Wave I School Administrator Weights
Variables needed to correct for design effects and weight the Wave I school administrator data.
3164
Wave I Grand Sample Weights
Variables needed to correct for design effects and weight the Wave I in-school data.
790,118
Wave II In-Home Interview Data
Data collected during the 1996 in-home interview.
2,54014,738
Wave II School Administrator Questionnaire Data
Information from the Wave II (phone-administered) questionnaires answered by administrators at the sampled schools.
100128
Wave II Grand Sample Weights
Variables needed to correct for design effects and weight the Wave II in-home data.
414,738
Wave III In-Home Interview Data
Respondent-level data collected during the 2001–2002 in-home interview includes field interviewer characteristics, AHPVT. 
1,87615,197
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.
515,197
Wave IV In-Home Interview Data
Data collected during the 2008 in-home interview.
97415,701
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.
515,701
Wave V Mixed-Mode Survey Data
Respondent data from the Wave V mixed-mode survey. (Comparable to Wave I-IV In-Home Interview)
90912,300
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.
1631,101
DESCRIPTIONVARIABLESOBSERVATIONS
Wave I In-School Friendship Nominations
Identification numbers of the friends that the respondent nominated during the in-school interview.
1190,118
Wave I In-Home Friendship Nominations
Identification numbers of the friends that the respondent nominated during the Wave I in-home interview.
1220,745
Wave II In-Home Friendship Nominations
Identification numbers of the friends that the respondent nominated during the Wave II in-home interview.
1114,738
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.
113,572

DESCRIPTIONVARIABLESOBSERVATIONS
Adolescent Pairs Data
Information that links and describes the sibling pairs identified at the Wave I in-home interview.
113,139
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.
104,368

DESCRIPTIONVARIABLESOBSERVATIONS
Wave I Contextual Data
Community contextual variables based on state, county, tract, and block group levels derived from the Wave I addresses.
2,68220,745
Wave II Contextual Data
Community contextual variables based on state, county, tract, and block group levels derived from the Wave II addresses.
2,68214,738
Wave III Contextual Data
Community contextual variables based on state, county, tract, and block group levels derived from the Wave III addresses.
59415,197
Wave I Spatial Analysis Data
Pseudo coordinates that can be used to calculate distances between friends in a school community.
420,301
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).
520,745
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).
514,738
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).
215,197
Wave IV Grouping Data
The pseudo FIPS codes in this file allow you to geographically group respondents by their Wave IV locations.
315,701
Wave III Census Region
This file contains the Census region codes for the respondents’ Wave III residential locations.
215,197
Wave IV Census Region
This file contains the Census region codes for the respondents’ Wave IV residential locations.
215,197
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.
3515,197
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.
30415,701

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.
1115,197
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.
1015,197
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.
215,701
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.
4015,810
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.
620,745
Wave I School District 
The SCHDESG1 data file contains measures of average per-pupil spending during school-age years, the average racial school segregation during school-age years, and the number of school-age years of exposure to desegregation court orders or release of them (if applicable) for Add Health respondent residence at Wave I, as measured by U.S. Census block groups mapped to 1969 school boundaries.
1320,745
DESCRIPTIONVARIABLESOBSERVATIONS
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.
754,279
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.
515,197
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.
1715,197
DESCRIPTIONFILESOBSERVATIONS
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.
612,237
Wave III Academic Networks
The Network files provide information on social networks based on the respondents’ course-taking patterns.
3varies 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.
6varies by file
Wave III Course-Level
The data in this file are needed for merging the course-level curriculum data with other Education Files.
1516,146
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.
8varies by file
Wave III Linking
This file contains variables designed to link transcript data to academic or school years and to Add Health.
112,237
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.
5varies by file
Wave III Transition
This file contains variables explaining the respondents’ movement through the educational system.
112,217
Wave III Weights
Files contain weights for the education data along with the school weights needed for HLM analysis.
2varies 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.
993,651
DESCRIPTIONVARIABLESOBSERVATIONS
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.
520,745
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.
520,745
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.
615,197
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.
615,701
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.
890,118
Add Health School Weights
The initial weights for the school are in this file.
2132
Wave V Mixed-Mode Weights
The Wave V Mixed-Mode Weights were released with the Wave V Mixed-Mode Survey.
DESCRIPTIONVARIABLESOBSERVATIONS
Wave I School Network Data
Network variables constructed from the in-school questionnaire data and friendship nominations.
44075,871

Wave V Disposition FileDESCRIPTIONVARIABLESOBSERVATIONS
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.
920,745
Wave III Disposition File
This file contains the final outcome of the 20,058 cases fielded at Wave III.
320,058
Wave IV Disposition File
This file contains the final outcome of the 19,962 cases fielded at Wave IV.
219,962
National Death Index File
This file contains the underlying cause of death and days alive after Wave I interview.
3227
Wave V Disposition File
The Wave V Disposition file was released with the Wave V Mixed-Mode Survey Data.
DESCRIPTIONVARIABLESOBSERVATIONS
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.
320,745
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.
220,745
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.
720,745
Wave III MSA Pseudo Codes
The MSA pseudo code created for each respondent’s Wave III location is in this file.
215,197
DESCRIPTIONVARIABLESOBSERVATIONS
Wave III Cotinine Assay Data
This file contains the cotinine and 3-hydroxycotinine assay values for 963 Wave III respondents.
5963
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.
465,126
Wave III HPV-MGEN Assay Weights
Sample weights for respondents with HPV and MGEN assay results are in this file.
514,322
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.
1615,197
DESCRIPTIONVARIABLESOBSERVATIONS
Wave IV Medication File Data
This file provides the therapeutic classification codes for the medications reported at Wave IV.
610,711
Wave IV Glucose – HbA1c
This file contains two measures of glucose homeostasis based on the assay of the Wave IV dried blood spots.
1015,701
Wave IV CRP-EBV
The results of the assays for CRP (C-reactive protein) and EBV (Epstein-Barr virus) are in this data file.
1615,701
Wave IV Lipids
This file contains constructed measures designed to facilitate analysis and interpretation of lipids results.
1415,701
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.
415,701
Wave IV Narcotic Drug Flag
This file contains a flag that identifies Wave IV respondents who report taking a medication that contains a narcotic.
215,701
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.
315,701
DESCRIPTIONVARIABLESOBSERVATIONS
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.
125,381
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.
135,381
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.
315,381
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.
3511,105
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.
115,381
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.
265,381
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.
145,381
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.
265,381
Wave V Biomarker Weight
This file contains the Wave V biomarker sample weight.
25,381
DESCRIPTIONVARIABLESOBSERVATIONS
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
21,886
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
31,886
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.
242,574
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
3015,701
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).
539,129
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.
1219,130
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.
235,690
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.
134,755
DESCRIPTIONVARIABLESOBSERVATIONS
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.
1920,745
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.
420,745
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.
120,246
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.
4915,701
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.
520,745
Wave IV Constructed Current Relationship Status
This dataset contains variables that describe the current relationship each respondent had by Wave IV.
315,701
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.
312,300
DESCRIPTIONVARIABLESOBSERVATIONS
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
21507
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
75332
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
131507
DESCRIPTIONVARIABLESOBSERVATIONS
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 filevaries 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.
420,745
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.
5226
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.
35317,669

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 2 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
This index lists all the questions and variable names in the Wave III young adult interview.
   
wave3ndx.zip Wave III Index: List of questions and variable names from the Wave III young adult interview 243KB 62
  Wave IV Index of Questions and Variables
This index lists all the questions and variable names in the Wave IV interview.
   
wave4ndx.zip Wave IV Index: List of questions and variable names from the Wave IV interview 315KB 28
  Wave V Index of Questions and VariablesThis index lists all of the questions and variables in the Wave V mixed-mode survey.    
wave5ndx.zip Wave V Index: List of questions and variable names from the Wave V mixed-mode survey 477KB 46