Add Health

The National Longitudinal Study of Adolescent to Adult Health (Add Health) is a longitudinal study of a nationally representative sample of adolescents in grades 7-12 in the United States during the 1994-95 school year. Beginning with an in-school questionnaire administered to a nationally representative sample of students in grades 7-12, the study followed up with a series of in-home interviews conducted in 1995, 1996, 2001-02, and 2007-08. Add Health is now in its fifth wave of data collection, which will begin in early 2016 and continue through 2018.

Wave I Data

The public-use dataset for Wave I contains information collected in 1994–95 from Add Health’s nationally representative sample of adolescents. This dataset consists of one-half of the core sample, and one-half of the oversample of African-American adolescents with a parent who has a college degree, chosen at random. The total number of Wave I respondents in this dataset is 6,504.

The Wave I public-use dataset includes information from each of the following sources (as available):

  • Wave I In-Home Data File, includes Wave I In-School Questionnaire Data, Wave I Parent Questionnaire Data and Add Health Picture Vocabulary Test Scores
  • Contextual data
  • In-school network data
  • Weights

Topics

  • Demographic Characteristics
  • Contextual Data
  • Family
  • Education
  • SES, Labor Market & Occupation
  • Physical Health
  • Psychological Well-being & Cognition
  • Friends & Social Network
  • Medication & Substance Use and Abuse
  • Reproductive Health
  • Crime/Delinquency/Victimization
  • Romantic Relationships
  • Risk Behavior

Wave II Data

The public-use dataset for Wave II contains information collected in 1996 from Add Health’s nationally representative sample of adolescents. The interview was generally similar to that at Wave I. Questions about attributes that should not change, such as ethnic background, were not repeated. A total of 4,834 of the original Wave I respondents were re-interviewed between April through August 1996.

The Wave II public-use dataset includes information from each of the following sources (as available):

  • Wave II In-Home Interview
  • Contextual data
  • Weights

Topics

  • Demographic Characteristics
  • Contextual Data
  • Family
  • Education
  • SES, Labor Market & Occupation
  • Physical Health
  • Psychological Well-being & Cognition
  • Friends & Social Network
  • Medication & Substance Use and Abuse
  • Reproductive Health
  • Crime/Delinquency/Victimization
  • Romantic Relationships
  • Risk Behavior

Wave III Data

Wave III

The Wave III public-use data are helpful in analyzing the transition between adolescence and young adulthood. A total of 4,882 of the original Wave I respondents were re-interviewed between August 2001 and April 2002. Wave III respondents were between 18 and 26 years old.

The In-home interview Wave III dataset includes the following data files (as available):

  • Main Respondent File: includes the In-Home Questionnaire data, AHPVT scores, and bio specimen data
  • Education Data: High School Exit Status and Math & Science Transcript data
  • Weights

Topics

  • Demographic Characteristics
  • Contextual Data
  • Family
  • Education
  • SES, Labor Market & Occupation
  • Physical Health
  • Psychological Well-being & Cognition
  • Friends & Social Network
  • Medication & Substance Use and Abuse
  • Reproductive Health
  • Crime/Delinquency/Victimization
  • Romantic Relationships
  • Risk Behavior

Wave IV Data

Wave IV was designed to study the developmental and health trajectories across the life course of adolescence into young adulthood. The Wave IV public-use file contains data on 5,114 respondents, aged 24 to 32*. In Wave IV, biological data was also gathered in an attempt to acquire a greater understanding of pre-disease pathways, with a specific focus on obesity, stress, and health risk behavior.

The In-home interview Wave IV dataset includes the following data files:

  • Wave IV In-home Interview File: variables from the in-home interview, including anthropometric measures
  • Wave IV Biomarker Data: Measures of EBV and hsCRP, Measures of Glucose homeostasis, and Lipids Measures
  • Weights

*17 respondents in the Wave IV public use sample were 33 years old at the time of the interview

Topics

  • Demographic Characteristics
  • Contextual Data
  • Family
  • Education
  • SES, Labor Market & Occupation
  • Physical Health
  • Psychological Well-being & Cognition
  • Friends & Social Network
  • Medication & Substance Use and Abuse
  • Reproductive Health
  • Crime/Delinquency/Victimization
  • Romantic Relationships
  • Risk Behavior

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Wave I In-Home Interview Data (part of Core Files bundle)

Requirements:

A merged file containing the Wave I In-Home Interview data, the Parent Questionnaire data (when available), the In-School Questionnaire data (when available), and the Add Health Picture Vocabulary data (when available), collected in 1994?1995. N= 20,745

Wave I School Administrator Questionnaire Data (part of Core Files bundle)

Requirements:

Information from the Wave I (self-administered) questionnaires answered by administrators at the sampled schools. N=172

School Information Data (part of Core Files bundle)

Requirements:

Additional information about the individual schools. N=172

Wave I In-School Questionnaire Data (part of Core Files bundle)

Requirements:

Adolescent responses to the In-School Questionnaire administered September 1994 through April 1995. N= 90,118

Wave I In-Home Weights (part of Core Files bundle)

Requirements:

Variables needed to correct for design effects and weight the Wave I in-home data. N=15,701

Wave I School Administrator Weights (part of Core Files bundle)

Requirements:

Variables needed to correct for design effects and weight the Wave I school administrator data. N=164

Wave I Grand Sample Weights (part of Core Files bundle)

Requirements:

Variables needed to correct for design effects and weight the Wave I in-school data. N=90,118

Wave II In-Home Interview Data (part of Core Files bundle)

Requirements:

Data collected during the 1996 in-home interview. N= 14,738

Wave II School Administrator Questionnaire Data (part of Core Files bundle)

Requirements:

Information from the Wave II (phone administered) questionnaires answered by administrators at the sampled schools. N=128

Wave II Grand Sample Weights (part of Core Files bundle)

Requirements:

Variables needed to correct for design effects and weight the Wave II in-home data. N=14,738

Wave III In-Home Interview Data (part of Core Files bundle)

Requirements:

Respondent-level data collected during the 2001?2002 in-home interview includes field interviewer characteristics, AHPVT. N=15,197

Wave III Grand Sample Weights (part of Core Files bundle)

Requirements:

Variables needed to correct for design effects and weight the Wave III in-home data, including longitudinal and cross-sectional weights. N=15,197

Wave IV In-Home Interview Data (part of Core Files bundle)

Requirements:

Data Collected during the 2008 in-home interview. N=15,701

Wave IV Grand Sample Weights (part of Core Files bundle)

Requirements:

Variables needed to correct for design effects and weight the Wave IV in-home data, including longitudinal and cross-sectional weights. N=15,701

Wave I In-School Friendship Nominations (Friendship Files)

Requirements:

Identification numbers of the friends that the respondent nominated during the in-school interview. N=90,118

Wave I In-Home Friendship Nominations (Friendship Files)

Requirements:

Identification numbers of the friends that the respondent nominated during the Wave I in-home interview. N=20,745

Wave II In-Home Friendship Nominations (Friendship Files)

Requirements:

Identification numbers of the friends that the respondent nominated during the Wave II in-home interview. N=14,738

Wave III Friend IDs (Friendship Files)

Requirements:

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. N=3,572

Adolescent Pairs Data (Sibling Files)

Requirements:

Information that links and describes the sibling pairs. N=3,139

Wave III Sibling IDs (Sibling Files)

Requirements:

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. N= 4,368

Wave I Contextual Data (Contextual Data Files)

Requirements:

Community contextual variables based on state, county, tract, and block group levels derived from the Wave I addresses. N=20,745

Wave I Spatial Analysis Data (Contextual Data Files)

Requirements:

X, Y coordinates that can be used to calculate distances between friends in a school community. N=20,301

Wave I Neighborhood Data (Contextual Data Files)

Requirements:

Pseudo state, county, tract, and block group variables that allow grouping of Add Health respondents geographically (based on Wave I addresses). N=20,745

Wave II Contextual Data (Contextual Data Files)

Requirements:

Community contextual variables based on state, county, tract, and block group levels derived from the Wave II addresses. N=14,738

Wave II Neighborhood Data (Contextual Data Files)

Requirements:

Pseudo state, county, tract, and block group variables that allow grouping of Add Health respondents geographically (based on Wave II addresses). N=14,738

Wave III Contextual Data (Contextual Data Files)

Requirements:

Community contextual variables based on state, county, tract, and block group levels derived from the Wave III addresses. N=15,197

Wave III Sex Ratio (Contextual Data Files)

Requirements:

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. N= 15,197

Wave III Grouping File Data (Contextual Data Files)

Requirements:

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).N=15,197

Wave III Region (Contextual Data Files)

Requirements:

This file contains the Census region codes for the respondents’ Wave III residential locations. N=15,197

Wave III Supplemental Tract-Level Contextual Data (Contextual Data Files)

Requirements:

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. N= 15,197

Wave IV Region (Contextual Data Files)

Requirements:

This file contains the Census region codes for the respondents’ Wave IV residential locations. N=15,197

Wave IV Grouping Data (Contextual Data Files)

Requirements:

The pseudo FIPS codes in this file allow you to geographically group respondents by their Wave IV locations. N=15,701

Wave IV Tract-Level Contextual Data (Contextual Data Files)

Requirements:

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. N=15,701

Wave III ASHA Call Data (Wave III Supplemental Files)

Requirements:

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. N=4,279

Wave III BEM Scores Data (Wave III Supplemental Files)

Requirements:

The masculinity and femininity raw and standard scores from the 30 item short form BEM Sex-Role Inventory are available in this file. N=15,197

Wave III Mentor Data (Wave III Supplemental Files)

Requirements:

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. N=15,197

Wave IV Consent (Wave IV Supplemental Files)

Requirements:

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. N= 15,701

Wave IV Constructed Variables (Wave IV Supplemental Files)

Requirements:

This file contains constructed variables on stress, depression, mastery, personality, arrest history, sexual behavior, smoking, and substance abuse created by Wave IV collaborators. N= 15,701

Wave III Academic Courses (Wave III Education Files)

Requirements:

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. N= 12,237

Wave III Academic Networks (Wave III Education Files)

Requirements:

The Network files provide information on social networks based on the respondents’ course-taking patterns. N varies by file

Wave III Context (Wave III Education Files)

Requirements:

School level contextual data are from the Common Core of Data (CCD), Private School Survey (PSS), the 1990 and 2000 Census, and the Office of Civil Rights. N varies by file

Wave III Course Level (Wave III Education Files)

Requirements:

The data in this file are needed for merging the course-level curriculum data with other Education Files. N=516,146

Wave III Curriculum (Wave III Education Files)

Requirements:

These math and science curriculum data are derived from coding the textbooks schools reported using for each course offered in these two subjects. N varies by file

Wave III Linking (Wave III Education Files)

Requirements:

This file contains variables designed to link transcript data to academic or school years and to Add Health. N= 12,237

Wave III Primary (Wave III Education Files)

Requirements:

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. N varies by file

Wave III Transition (Wave III Education Files)

Requirements:

This file contains variables explaining the respondents’ movement through the educational system. N=12,217

Wave III Education Weights (Wave III Education Files)

Requirements:

Files contain weights for the education data along with the school weights needed for HLM analysis. N varies by file

Wave I In-Home Weight Components (Additional Weight Files)

Requirements:

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. N= 20,745

In-School Weight Components (Additional Weight Files)

Requirements:

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. N= 90,118

Wave II In-Home Weight Components (Additional Weight Files)

Requirements:

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. N= 14,738

Wave III In-Home Weight Components (Additional Weight Files)

Requirements:

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. N=15,197

Wave IV Weight Components (Additional Weight Files)

Requirements:

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. N= 15,701

Add Health School Weights (Additional Weight Files)

Requirements:

The initial weights for the school are in this file. N=132

School Network Data (Network Files)

Requirements:

Network variables constructed from the in-school questionnaire data and friendship nominations. N=75,871

Wave I and II Disposition File (Disposition Files)

Requirements:

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. N= 20,745

National Death Index File (Disposition Files)

Requirements:

This file contains the underlying cause of death and days alive after Wave I interview. N=227

Wave III Disposition File (Disposition Files)

Requirements:

This file contains the final outcome of the 20,058 cases fielded at Wave III. N=20,058

Wave IV Disposition File (Disposition Files)

Requirements:

This file contains the final outcome of the 19,962 cases fielded at Wave IV. N=19,962

Wave I Climate File (ONE: Obesity and Neighborhood Environment Files)

Requirements:

This file contains the climate data for Wave I respondents based on the nearest climate station. Information is available on precipitation, total snowfall, sky cover, temperature, and total hours of sunshine. N=20,745

Wave I Street Connectivity File (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These files contain road network connectivity measures within 1, 3, 5, and 8.05 km (5 miles) of the Wave I respondent locations. N= 20,745

Wave I Crime File (ONE: Obesity and Neighborhood Environment Files)

Requirements:

The county-level crime data in these files are based on the Wave I respondent locations. N= 20,745

Wave I Geocode Source (ONE: Obesity and Neighborhood Environment Files)

Requirements:

The data source of the Wave I respondent residential geocodes (latitude and longitude) are provided in these files. N= 20,745

Wave I Land Cover Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These files contain land cover metrics within 1, 3, 5, and 8.05 km (5 miles) of Wave I respondent locations. N= 20,745

Wave I Parks Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

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 are in these files. N=20,745

Wave I Resources Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These Add Health files provide data on the presence of various physical activity (PA) resources situated near respondent residences at Wave I. N=20,745

Wave I Urban Distances (ONE: Obesity and Neighborhood Environment Files)

Requirements:

Contains Euclidean distances to both 1990 and 2000 U.S. Census Urbanized Areas (UAs) for each Wave I respondent. N=20,745

Wave I Weather Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

This file contains weather data for Wave I respondents based on the nearest weather station reporting data for the corresponding survey month and year. N=20,745

Wave I Population Density Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

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. N=20,745

Wave I School Distance Measures (ONE: Obesity and Neighborhood Environment Files)

Requirements:

This file contains the distance between the geocoded point locations of each respondent’s Wave I location and that respondent’s school. N=20,745

Wave I ACCRA Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These data files report ACCRA Cost of Living Index data for Wave I based on respondent location and the year and quarter of the Add Health interview. N=20,745

Wave I Employment Files (ONE: Obesity and Neighborhood Environment Files)

Requirements:

Certain county-level employment data from the U.S. Bureau of Labor Statistics are attached to Wave I respondent locations. N=20,745

Wave I Length of Day (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These data files contain the number of hours of daylight at each Wave I respondent location based on that respondent’s latitude and survey date. N=20,745

Wave I Road Type Length Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

Road type length calculations within radii of 1, 3, 5, and 8.05 kilometers (5 miles) of Wave I respondent locations. N=20,745

Wave I Rural-Urban Commuting Area (RUCA) Codes (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These data files define the rural-urban commuting characteristics of Wave I 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. N=20,745

Wave I Grouping File (ONE: Obesity and Neighborhood Environment Files)

Requirements:

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. N: 20,745

Wave III Street Connectivity Files (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These files contain road network connectivity measures within 1, 3, 5, and 8.05 km (5 miles) of the Wave III respondent locations. N= 15,197

Wave III Crime File (ONE: Obesity and Neighborhood Environment Files)

Requirements:

The county-level crime data in these files are based on the Wave III respondent locations. N= 15,197

Wave III Geocode Source (ONE: Obesity and Neighborhood Environment Files)

Requirements:

The data source of the Wave III respondent residential geocodes (latitude and longitude) are provided in these files. N= 15,197

Wave III Land Cover Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These files contain land cover metrics within 1, 3, 5, and 8.05 km (5 miles) of Wave III respondent locations. N= 15,197

Wave III Parks Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

The counts of public parks within a Euclidean distance of 1, 3, 5, and 8.05 kilometers (5 miles) of each respondent at Wave III are in these files. N= 15,197

Wave III Resources Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These Add Health files provide data on the presence of various physical activity (PA) resources situated near respondent residences at Wave III. N=15,197

Wave III Urban Distances (ONE: Obesity and Neighborhood Environment Files)

Requirements:

Contains the Euclidean distance to 2000 U.S. Census Bureau-defined urbanized areas (UAs) for each Wave III respondent. N= 15,197

Wave III Weather Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

This file contains weather data for Wave III respondents based on the nearest weather station reporting data for the corresponding survey month and year. N=15,197

Wave III Population Density Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

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. N=15,197

Wave III Mobility Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

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. N=20,745

Wave III MSA Pseudo Codes (ONE: Obesity and Neighborhood Environment Files)

Requirements:

The MSA pseudo code created for each respondent’s Wave III location is in this file. N=15,197

Wave III ACCRA Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These data files report ACCRA Cost of Living Index data for Wave III based on respondent location and the year and quarter of the Add Health interview. N=15,197

Wave III Employment Files (ONE: Obesity and Neighborhood Environment Files)

Requirements:

Certain county-level employment data from the U.S. Bureau of Labor Statistics are attached to Wave III respondent locations. N=15,197

Wave III Length of Day (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These data files contain the number of hours of daylight at each Wave III respondent location based on that respondent’s latitude and survey date. N=15,197

Wave III Road Type Length Data (ONE: Obesity and Neighborhood Environment Files)

Requirements:

Road type length calculations within radii of 1, 3, 5, and 8.05 kilometers (5 miles) of Wave III respondent locations. N=15,197

Wave III Rural-Urban Commuting Area (RUCA) Codes (ONE: Obesity and Neighborhood Environment Files)

Requirements:

These data files define the rural-urban commuting characteristics of 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. N=15,197

Wave III Cotinine Assays Data (Wave III Biomarker Files)

Requirements:

This file contains the cotinine and 3-hydroxycotinine assay values for 963 Wave III respondents. N=963

Wave III HPV-MGEN Assays Data (Wave III Biomarker Files)

Requirements:

Assay results for human papillomavirus and mycoplasma genitalium are available for a subset of the Wave III respondents who provided a urine sample. N=5,126

Wave III HPV-MGEN Assay Weights (Wave III Biomarker Files)

Requirements:

Sample weights for respondents with HPV and MGEN assay results are in this file. N=14,322

Wave III Urinalysis Data (Wave III Biomarker Files)

Requirements:

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. N= 15,197

Wave IV Medication File (Wave IV Biomarker Files)

Requirements:

This file provides the therapeutic classification codes for the medications reported at Wave IV. N=10,711

Wave IV Narcotic Drug Flag (Wave IV Biomarker Files)

Requirements:

This file contains a flag that identifies Wave IV respondents who report taking a medication that contains a narcotic. N= 15,701

Wave IV Glucose (Wave IV Biomarker Files)

Requirements:

This file contains two measures of glucose homeostasis based on the assay of the Wave IV dried blood spots. N= 15,701

Wave IV CRP-EBV (Wave IV Biomarker Files)

Requirements:

The results of the assays for CRP (C-reactive protein) and EBV (Epstein-Barr virus) are in this data file. N= 15,701

Wave IV Lipids (Wave IV Biomarker Files)

Requirements:

This file contains constructed measures designed to facilitate analysis and interpretation of lipids results. N= 15,701

Wave IV Baroreceptor Sensitivity (Wave IV Biomarker Files)

Requirements:

This file contains constructed measures for baroreflex sensitivity, heart rate recovery, and systolic blood pressure recovery for the Wave IV respondents. N= 15,701

Wave IV BMI Genetic Risk Score (Wave IV Biomarker Files)

Requirements:

This file contains the BMI genetic risk score for Add Health twin and full sibling respondents who provided saliva samples at Wave IV. N= 1,886

Wave IV Education Genetic Risk Score (Wave IV Biomarker Files)

Requirements:

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. N= 1,886

Wave I Political Context Data (Political Context Data Files)

Requirements:

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. N= 20,745

Wave II Political Context Data (Political Context Data Files)

Requirements:

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. N= 14,738

Wave III Political Context Data (Political Context Data Files)

Requirements:

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. N=15,197

Wave III Alcohol Outlet Density Data (Alcohol Density Files)

Requirements:

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. N=15,197

Wave III DNA Data (DNA Files)

Requirements:

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. N=2,574

Wave IV DNA Data (DNA Files)

Requirements:

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. N=15,701

Waves I and II Romantic/Friend Nominations (Romantic Pairs)

Requirements:

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.

Wave III Partner In-home (Romantic Pairs)

Requirements:

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

Wave III Partner ASHA Call (Romantic Pairs)

Requirements:

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

Wave III Partner Urinalysis (Romantic Pairs)

Requirements:

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

Wave III Climate Files (ONE: Obesity and Neighborhood Environment Files)

Requirements:

This file contains the climate data for Wave III respondents based on the nearest climate station. Information is available on precipitation, total snowfall, sky cover, temperature, and total hours of sunshine. N=15,197

Wave I In-Home Interview Data

A merged file containing the Wave I In-Home Interview data, the Parent Questionnaire data (when available), the In-School Questionnaire data (when available), and the Add Health Picture Vocabulary data (when available), collected in 1994?1995. N= 20,745

Wave I School Administrator Questionnaire Data

Information from the Wave I (self-administered) questionnaires answered by administrators at the sampled schools. N=172

School Information Data

Additional information about the individual schools. N=172

Wave I In-School Questionnaire Data

Adolescent responses to the In-School Questionnaire administered September 1994 through April 1995. N= 90,118

Wave I In-Home Weights

Variables needed to correct for design effects and weight the Wave I in-home data. N=15,701

Wave I School Administrator Weights

Variables needed to correct for design effects and weight the Wave I school administrator data. N=164

Wave I Grand Sample Weights

Variables needed to correct for design effects and weight the Wave I in-school data. N=90,118

Wave II In-Home Interview Data

Data collected during the 1996 in-home interview. N= 14,738

Wave II School Administrator Questionnaire Data

Information from the Wave II (phone administered) questionnaires answered by administrators at the sampled schools. N=128

Wave II Grand Sample Weights

Variables needed to correct for design effects and weight the Wave II in-home data. N=14,738

Wave III In-Home Interview Data

Respondent-level data collected during the 2001?2002 in-home interview includes field interviewer characteristics, AHPVT. N=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. N=15,197

Wave IV In-Home Interview Data

Data Collected during the 2008 in-home interview. N=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. N=15,701

Wave I In-School Friendship Nominations

Identification numbers of the friends that the respondent nominated during the in-school interview. N=90,118

Wave I In-Home Friendship Nominations

Identification numbers of the friends that the respondent nominated during the Wave I in-home interview. N=20,745

Wave II In-Home Friendship Nominations

Identification numbers of the friends that the respondent nominated during the Wave II in-home interview. N=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. N=3,572

Adolescent Pairs Data

Information that links and describes the sibling pairs. N=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. N= 4,368

Wave I Contextual Data

Community contextual variables based on state, county, tract, and block group levels derived from the Wave I addresses. N=20,745

Wave I Spatial Analysis Data

X, Y coordinates that can be used to calculate distances between friends in a school community. N=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). N=20,745

Wave II Contextual Data

Community contextual variables based on state, county, tract, and block group levels derived from the Wave II addresses. N=14,738

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). N=14,738

Wave III Contextual Data

Community contextual variables based on state, county, tract, and block group levels derived from the Wave III addresses. N=15,197

Wave III Sex Ratio

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. N= 15,197

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).N=15,197

Wave III Region

This file contains the Census region codes for the respondents’ Wave III residential locations. N=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. N= 15,197

Wave IV Region

This file contains the Census region codes for the respondents’ Wave IV residential locations. N=15,197

Wave IV Grouping Data

The pseudo FIPS codes in this file allow you to geographically group respondents by their Wave IV locations. N=15,701

Wave IV 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. N=15,701

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. N=4,279

Wave III BEM Scores Data