Title: National Longitudinal Study of Adolescent Health ICPSR
1National Longitudinal Study of Adolescent Health
_at_ ICPSR
- Felicia LeClere
- Russ Hathaway
- With help from the faculty and staff at Carolina
Population Center, University of North Carolina
2National Longitudinal Study of Adolescent Health
- On-going study of the developmental and health
trajectories of a nationally-representative
sample of 20,000 adolescents - Initiated in 1994 in response to a congressional
mandate to fund a study of adolescent health - Funded by the National Institute of Child Health
and Human Development (NICHD) with co-funding
from multiple other federal agencies
3National Longitudinal Study of Adolescent Health
- Developed and coordinated by researchers at UNCs
Carolina Population Center - PrincipaI Investigator/Director
- Waves IIII J. Richard Udry
- Wave IV Kathleen Mullan Harris
4Sampling Structure of Add Health
School Sampling Frame QED
HS
HS
HS
HS
HS
H
Feeder
Feeder
Feeder
Feeder
Feeder
Sampling Frame of Adolescents and Parents N
100,000 (100 to 4,000 per pair of schools)
Ethnic Samples
High Educ Black
Disabled Sample
Puerto Rican
Saturation Samples from 16 Schools
Chinese
Main Sample 200/Community
Cuban
Genetic Samples
Identical Twins
Full Sibs
Fraternal Twins
Half Sibs
5Longitudinal Design of Add Health
In-School Administration
In-Home Administration
School Admin 144
Adolescents in grades 7-12 20,745
Wave I 1994-1995 (78.9)
Parent 17,670
Students 90,118
School Admin 128
Wave II 1996 (88.2)
Adolescents in grades 8-12 14,738
Wave III 2001-2002 (77.4)
Young Adults Aged 18-26 15,197
Partners 1,507
Wave IV 2007-08 (80.0)
Adults Aged 24-32 15,500
6Questionnaire Content Across Waves
- Waves I, II
- Demographic
- Family, siblings, friends
- Education, work
- Physical and mental health
- Daily activities and sleep
- Relationships
- Sexual, fertility histories
- Substance use
- Delinquency and violence
- Attitudes, religion
- Economics, expectations
- Psychological, personality
- Wave III
- Demographic
- Family, siblings, friends
- Education, work, military
- Physical and mental health
- Daily activities and sleep
- Relationships
- Sexual, fertility histories
- Substance use
- Involvmt w/criminal justice sys
- Attitudes, religion
- Economics, expectations
- Psychological, personality
- Children and parenting
- Civic participation
- Gambling
- Mentoring
- Wave IV
- Demographic
- Family, siblings, friends
- Educ, work, military (records)
- Physical and mental health
- Daily activities and sleep
- Relationships
- Sexual, fertility histories
- Substance use and abuse
- Involvmt w/criminal justice sys
- religWork attitudes and chars,
- Economics, expectations
- Big 5 Personality, stressors
- Children and parenting
- Civic participation
- Psychosocial factors
- Cognitive function
7Biological Data Collection Across Waves
8Wave IV Locate and Interview Rates
- Data collection ended in January 2009
- Located 92 of sample members
- Interviewed 80 of eligible cases
- Wave IV sample size approximately 15,600
9Wave IV Biospecimen Participate Rates
- 96 of respondents consented to provide saliva
for DNA - 94 consented to provide blood spots
- For each specimen, 81 of those consenting to
collection also consented to archiving - Approximately 12,200 DNA samples available for
further testing
10Accessing Add Health Data
- Add Health data are available in two formsa
public-use data set and a restricted-use
contractual data set - Public-use data available from
- Inter-University Consortium for Political and
Social Research (ICPSR) - Sociometrics
- Instructions available on the Add Health Web Page
11Accessing Add Health Data
- Restricted-use contractual data set
- Currently available from Carolina Population
Center - Researchers must have an IRB-approved security
plan - In 2010, ICPSR will disseminate both data forms
- Changes in dissemination procedures
- Posted on Add Health web page
- Emailed to Add Health listserv
12Dissemination Accomplishments
- Data made available to more than 3,500
investigators for analyses - 300 grants awarded to analyze data
- 1,000 peer-reviewed publications
- Over 200 dissertations and masters theses using
Add Health
13Add Health Web Page
- Online code books
- Manuscripts to inform data analysis
- Bibliography of Add Health publications
- Information about the bi-annual Add Health Users
Conference in Washington DC - Downloadable application/contract and
instructions for data requests
14(No Transcript)
15Add Health _at_ICPSR
- Distributed through Data Sharing for Demographic
Research (cooperative agreement funded by NICHD) - Free to the public with a MyData account
- Download public use directly from website
- Free user support at netmail_at_icpsr.umich.edu or
dsdr_at_icpsr.umich.edu
16DSDR Add Health Data
- Current holdings include Waves I-III Public Use
Files in SAS, STATA, SPSS format - On-line analysis capability for all Public Use
Files - Original questionnaires and searchable PDF
documentation - Updated bibliographic citations with full text
where available
17Data available
- Waves I and II
- Public Use Respondent files
- Sample Weight files
- Contextual files
18Data Available
- Wave III
- Public Use Data by Sections
- Peabody Picture Vocabulary Test Data
- Education Data
- Graduation Data
- Network Variables Data
- Grand Sample, Education, School, and Graduation
Weights
19Add Health Documentation
- DSDR Codebooks
- Value and Variable Labels
- Question Text
- Add Health Documentation
- Add Health Codebooks
- Questionnaires
- User Guides
- Related Literature and Literature Search
20Add Health Online Data Analysis
- Wave I Public Use Data
- Wave II Public Use Data
- Wave III
- Peabody Picture Vocabulary Test Data
- Public Use Data (and by Section)
- Public Use Education Data
- Public Use Graduation Data
- Unweighted
21Add Health Online Analysis
- Powered by SDA
- Allow users to conduct searches and on-line
analysis as well as generate extracts - Extracts available in SAS, SPSS, STATA with
custom codebooks - Cannot link across datasets
22Coming in January 2010
- Wave IV public use data
- Restricted use data from all waves through
on-line contracting system - New Add health page _at_ DSDR