Table 1.
Descriptions of NSFG, NLSY97, and Add Health Surveys
| NSFG | NLSY97 | Add Health | |
|---|---|---|---|
| Study Design | Cross-sectional | Longitudinal | Longitudinal |
| Survey Sample | Nationally representative household survey of women aged 15–44 | Nationally representative household survey of youth born between 1980–1984 and living in the United States at first 1997–1998 interview | Representative of students in grades 7–12 at time of 1994–1995 Wave 1 interview |
| Analysis Sample | Full sample | 2013–2014 Round 16 respondents | Wave 4 respondents |
| Survey Round(s) Used in Analysis | 2006–2010, 2011–2015 | Rounds 12–16 | Wave 4 |
| Sampling | Multistage, stratified, clustered | Multistage, stratified, clustered | Multistage, stratified, school-based, clustered |
| Response Rate |
78% women (2006–2010); 72% women (2011–2015) |
82% women (Round 16) | 80% (Wave 4) |
| IRB Approval | National Center for Health Statistics | The Ohio State University and NORC at the University of Chicago | University of North Carolina at Chapel Hill |
| Survey Modea | FTF; ACASI | ACASI | ACASI |
| Length of Abortion Recall Period | Lifetime (FTF); last five years (ACASI) | Since last interview; recall may have been up to eight years | Lifetime |
| Date of Abortion | Month and year (FTF); unspecified within interval (ACASI) | Month and year | Month and year |
aFTF = face-to-face interview; ACASI = audio computer-assisted self-interview.