Description & Citation--Study No. 21600

• Bibliographic Description
• Scope of Study
• Methodology
• Access and Availability

Bibliographic Description

21600

National Longitudinal Study of Adolescent Health (Add Health), 1994-2008

Harris, Kathleen Mullan, University of North Carolina-Chapel Hill

Udry, J. Richard, University of North Carolina-Chapel Hill

United States Department of Health and Human Services. National Institutes of Health. National Institute on Deafness and Other Communication Disorders

United States Department of Health and Human Services. National Institutes of Health. Eunice Kennedy Shriver National Institute of Child Health and Human Development (P01-HD31921)

United States Department of Health and Human Services. National Institutes of Health. National Institute on Drug Abuse

United States Department of Health and Human Services. National Institutes of Health. National Institute of General Medical Sciences

United States Department of Health and Human Services. National Institutes of Health. National Institute of Mental Health

United States Department of Health and Human Services. National Institutes of Health. National Institute of Nursing Research

United States Department of Health and Human Services. National Institutes of Health. Office of AIDS Research

United States Department of Health and Human Services. National Institutes of Health. Office of Behavioral and Social Sciences Research

United States Department of Health and Human Services. National Institutes of Health. Office of Research on Women's Health

United States Department of Health and Human Services. Office of Public Health and Science. Office of Population Affairs

United States Department of Health and Human Services. Centers for Disease Control and Prevention. National Center for Health Statistics

United States Department of Health and Human Services. Centers for Disease Control and Prevention. Office of Minority Health

United States Department of Health and Human Services. Office of Public Health and Science. Office of Minority Health

United States Department of Health and Human Services. Office of the Assistant Secretary for Planning and Evaluation

National Science Foundation

United States Department of Health and Human Services. National Institutes of Health. National Cancer Institute

United States Department of Health and Human Services. National Institutes of Health. National Institute of Alcohol Abuse and Alcoholism

Harris, Kathleen Mullan, and J. Richard Udry. National Longitudinal Study of Adolescent Health (Add Health), 1994-2008. ICPSR21600-v9. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2012-05-08. doi:10.3886/ICPSR21600.v9

National Longitudinal Study of Adolescent Health (Add Health), Restricted Data Series

Scope of Study

The National Longitudinal Study of Adolescent Health (Add Health) is a longitudinal study of a nationally representative sample of adolescents in grades 7-12 in the United States during the 1994-1995 school year. The Add Health cohort has been followed into young adulthood with four in-home interviews, the most recent in 2008, when the sample was aged 18-26. Add Health combines longitudinal survey data on respondents' social, economic, psychological and physical well-being with contextual data on the family, neighborhood, community, school, friendships, peer groups, and romantic relationships, providing unique opportunities to study how social environments and behaviors in adolescence are linked to health and achievement outcomes in young adulthood.

Public use biomarker data has been added. The Glucose/HbA1c data file contains two measures of glucose homeostasis based on assays of the Wave IV dried blood spots: Glucose (mg/dl) and Hemoglobin A1c (HbA1c, %). Six additional constructed measures -- fasting duration, classification of fasting glucose, classification of non-fasting glucose, classification of HbA1c, diabetes medication, and a joint classification of glucose, HbA1c, self-reported history of diabetes, and anti-diabetic medication use -- are also included.

A restricted version of Add Health is available. See National Longitudinal Study of Adolescent Health (Add Health), 1994-2008, Restricted Data Series.

academic achievement, adolescents, alcohol consumption, biomarkers, birth control, classroom environment, contraception, dating (social), diabetes, drinking behavior, drug use, eating habits, educational environment, families, family planning, family relationships, family structure, friendships, health, health behavior, health care access, health status, household composition, interpersonal relations, living arrangements, marriage, neighborhood characteristics, neighborhoods, parent child relationship, parental attitudes, parental influence, physical characteristics, physical condition, physical fitness, physical limitations, pregnancy history, public assistance programs, religious behavior, religious beliefs, school attendance, self concept, self esteem, sexual attitudes, sexual behavior, smoking, social environment, social networks, tobacco use, violent behavior, welfare services

United States

• 1994--2008

• 1994--2008

individual

Adolescents in grades 7-12 and their families.

survey data

2010-12-07 Part 13 was removed because it contains weights that have been superseded by Parts 21 and 22.

Wave 1 and Wave 2 field work was conducted by the National Opinion Research Center of the University of Chicago. Wave 3 field work was conducted by the Research Triangle Institute.

Methodology

Wave 1, Stage 1 School sample: stratified, random sample of all high schools in the United States. A school was eligible for the sample if it included an 11th grade and had a minimum enrollment of 30 students. A feeder school, a school that sent graduates to the high school and that included a 7th grade, was also recruited from the community. Wave 1, Stage 2: An in-home sample of 27,000 adolescents was drawn consisting of a core sample from each community plus selected special over samples. Eligibility for over samples was determined by an adolescent's responses on the In-School Questionnaire. Adolescents could qualify for more than one sample. In addition, parents were asked to complete a questionnaire about family and relationships. The Wave 2 in-home interview sample is the same as the Wave 1 in-home interview sample, with a few exceptions. Information about neighborhoods/communities was gathered from a variety of previously published databases. Wave 3: The in-home Wave 3 sample consists of Wave 1 respondents who could be located and re-interviewed six years later. Wave 3 also collected High School Transcript Release Forms as well as samples of urine and saliva.

Weight variables for Wave 1 (21600-0001) are in a separate data file: 21600-0002. Weights for Wave 2 are in the Wave 2 weight data file: 21600-0021. Wave 3 weights are in a separate data file: 21600-0022. Education data weights are in 21600-0016 and 21600-0017. Wave 4 weights are in 21600-0029.

audio computer-assisted self interview (ACASI), record abstracts, computer-assisted personal interview (CAPI), computer-assisted self interview (CASI), computer-assisted telephone interview (CATI), coded on-site observation, cognitive assessment test, face-to-face interview, paper and pencil interview (PAPI), self-enumerated questionnaire, on-site questionnaire, telephone interview

All archived data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. The archive also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, the archive performed the following processing steps for this data collection:

• Performed consistency checks.
• Standardized missing values.
• Checked for undocumented or out-of-range codes.

Access and Availability

Detailed file-level information (such as record length, case count, and variable count) is listed in the file manifest.

2008-08-04

• 2012-05-08 CRP and EBV Test restul data has been added to the study as Part 31. New updated data has replaced the existing Part 23 data. The documentation for Part 23 has been updated.

• 2012-02-23 Glucose data was added.

• 2012-02-06 An error was discovered in a few variables for part 23, so the data and documentation was updated.

• 2012-01-23 An additional documentation file about W4 weights was added to pt29

• 2011-12-14 An error was discovered in one variable for part 23, so the data and documentation was updated. A page of additional documentation was also added to the existing doc file for part 29.

• 2011-11-28 Updated weight dataset and added/updated weight documentation.

• 2011-03-18 Part 13 was removed because it contains weights that have been superseded by Parts 21 and 22. Wave 4 data was added as Parts 23 through 29.

• 2010-05-04 Documentation files have been added/revised for Parts 2, 21, and 22.

• 2010-04-09 The Grand Sample Weight files were revised so that there is now a separate weight file for each wave.

• 2009-03-11 The title to Part 2 was changed. In addition, value labels were corrected to Parts 3, 7, 8, 9, and 10. The corrections addressed an issue caused by brackets in the values labels.

• 2009-02-23 An incorrect variable label in the Wave II public use data was corrected. New documentation and data files were generated with the corrected variable label.

• 2008-10-31 Three new public-use datasets have been added (datasets 18, 19, and 20).

• 2008-08-19 Descriptive content has been added to the metadata record.

• DS1: Wave 1, Public Use Data
• DS2: Wave 1, Grand Sample Weights, Public Use Data
• DS3: Wave 2, Public Use Data
• DS4: Wave 3, Peabody Picture Vocabulary Test Score Data, Public Use
• DS5: Wave 3, Public In-Home Questionnaire, Section 17 Data
• DS6: Wave 3, Public In-Home Questionnaire, Section 18 Data
• DS7: Wave 3, Public In-Home Questionnaire, Section 19 Data
• DS8: Wave 3, Public In-Home Questionnaire, Section 22 Data
• DS9: Wave 3, Public In-Home Questionnaire, Section 23 Data
• DS10: Wave 3, Public In-Home Questionnaire, Section 24 Data
• DS11: Wave 3, Public In-Home Questionnaire, Section 25 Data
• DS12: Wave 3, Public In-Home Questionnaire
• DS14: Wave 3, Public Use Education Data
• DS15: Wave 3, Public Use Graduation Data
• DS16: Wave 3, Public Use Education Data Weights
• DS17: Wave 3, Add Health School Weights
• DS18: Network Variables Data, Public Use
• DS19: Wave 1, Public Use Contextual Data
• DS20: Wave 2, Public Use Contextual Data
• DS21: Wave 2, Grand Sample Weights, Public Use Data
• DS22: Wave 3, Grand Sample Weights, Public Use Data
• DS23: Wave 4, Public Use Data
• DS24: Wave 4, Public In-Home Questionnaire, Section 16B Data
• DS25: Wave 4, Public In-Home Questionnaire, Section 16C Data
• DS26: Wave 4, Public In-Home Questionnaire, Section 18 Data
• DS27: Wave 4, Public In-Home Questionnaire, Section 19 Data
• DS28: Wave 4, Public In-Home Questionnaire, Section 20A Data
• DS29: Wave 4, Grand Sample Weights, Public Use Data
• DS30: Wave 4, Public Use Biomarkers, Glucose Data
• DS31: Wave 4, Public Use Biomarkers, Measures of EBV and hsCRP