TABLE 1—
Descriptive Sample Profile: National Longitudinal Study of Adolescent Health, 1994–2002
| Characteristic | Full Sample (N = 4018) | Used Condom at Sexual Debut (n = 2491) | Did Not Use Condom at Sexual Debut (n = 1527) |
| Condom use at sexual debut, %a | 62 | 100 | 0 |
| Condom use during most recent sexual intercourse, % | 38 | 40 | 34 |
| Median lifetime no. of sexual partnersb (range: 1–50) | 5.00 | 5.00 | 5.00 |
| Positive gonorrhea or chlamydia test, % | 6 | 5 | 8 |
| Women, % | 52 | 50 | 53 |
| Mean age, y (range: 18–26) | 22.22 | 22.22 | 22.22 |
| Race/ethnicity, % | |||
| White | 64 | 66 | 61 |
| Black | 21 | 22 | 21 |
| Hispanic | 12 | 10 | 14 |
| Asian | 2 | 2 | 2 |
| Native American | 1 | 0 | 2 |
| Married, % | 22 | 20 | 26 |
| Mean family socioeconomic status score (wave I only; range: 1–10) | 5.37 | 5.42 | 5.28 |
| Mean Picture Vocabulary Test (IQ) score (range: 7–122) | 98.22 | 99.21 | 96.62 |
| Mean highest educational level, y (range: 6–22) | 12.68 | 12.87 | 12.36 |
| Exposed to sex education, % (wave I only) | 86 | 87 | 84 |
| Mean risk-taking scale scorea (range: 0–4) | 1.29 | 1.26 | 1.34 |
| Mean negative feelings scale scorea (range: 0–2.4) | 0.57 | 0.54 | 0.63 |
| Mean self-efficacy scale scorea (range: 1–5) | |||
| With partner and birth control | 4.22 | 4.34 | 4.04 |
| Motivation to use birth control | 3.86 | 3.98 | 3.67 |
| Mean maternal approval of birth control scale scorea (range: 1–5) | 3.56 | 3.60 | 3.51 |
| Mean age at sexual debut, y (range: 10–20) | 15.18 | 15.35 | 14.91 |
| Use of oral contraceptive pill or Depo-Provera at sexual debut, %a | 15 | 22 | 4 |
| Median no. of sexual partners in past 12 mo (range: 0–45) | 1.00 | 1.00 | 1.00 |
| Median frequency of sexual encounters in past 12 mo (range: 0–900) | 40.00 | 40.00 | 40.00 |
| Use of birth control during most recent sexual intercourse, % | 65 | 68 | 59 |
| Alcohol or drug use at sexual debut, % | 10 | 9 | 13 |
| Median interval between sexual debut and most recent sexual intercourse, yb (range: 4.4–15.6) | 6.83 | 6.75 | 7.00 |
| Ever diagnosed with sexually transmitted disease, %c | 24 | 22 | 27 |
| Ever regretted sexual activity after alcohol use, %c | 36 | 34 | 40 |
aAs reported in wave I or II, depending on when sexual debut occurred.
bCalculated from data collected during wave at which sexual debut occurred (i.e., wave I or wave II) and during wave III.
cAs reported in waves I, II, and III.