New Data Releases

To apply for the any of these restricted-use data files:

  • New users will need to apply for restricted-use data. Please download and complete the restricted-use data contract using the CPC Data Portal.
  • Current Add Health users can log in to their CPC Data Portal application to request additional data.

For more information, please visit the Data Portal’s Frequently Asked Questions page.

Data Released (November 3, 2022)

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. N=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. N=5,381

Data Released (September 9, 2022)

Wave IV dbGaP GWAS Sample Weight

A weight component for the dbGaP GWAS Sample. N=9,975

Data Released (June 21, 2022)

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. N=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. N=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. N=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. N=540

Data Released (February 22, 2022)

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. N=1,839

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. N=1,839

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. N=3,883

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. N=1,839

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. N=1,839

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 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. N=1,839

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. N=1,839

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 creatine concentration, the cystatin C concentration, or both concentrations. Classifications according to both clinical and KDIGO guidelines are available as well. N=1,839

Data Released (September 1, 2021)

Wave V Public-Use Data

Wave V Public-Use Data is a smaller sample of the Wave V Mixed-Mode Survey Data. This sample, like the other waves of public-use data, 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. N=4,196.

Data Released (July 27, 2021)

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.

Data Released (June 3, 2021)

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.

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.

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.

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.

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.

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.

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.

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.

Data Released (February 22, 2021)

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.

Data Released (November 19, 2020)

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.

Data Released (August 16, 2020)

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.

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.

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.

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.

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.

Wave V Biomarker Weight

This file contains the Wave V biomarker sample weight.

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.

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.

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.