TABLE 2—
Weighted Percentages of Respondents Who Reported by Age 18 Years No Sexual Activity, 1 of the 3 Types of Sexual Intercourse First, or 2 or 3 Sexual Behaviors Initiated at the Same Age, by Sociodemographic Characteristics: National Longitudinal Study of Adolescent Health, 2008
| Sociodemographic Characteristics | No Sexual Activity, % (No.) | Oral-Genital Intercourse First, % (No.) | Vaginal Intercourse First, % (No.) | Anal Intercourse First, % (No.) | First 2 or 3 Behaviors Reported at Same Age, % (No.) |
| Total | 19.2 (2766) | 14.7 (1829) | 33.3 (4901) | 0.3 (41) | 32.6 (4298) |
| Biological sex | |||||
| Male | 19.3 (1300) | 18.3 (1104) | 23.6 (1643) | 0.4 (23) | 38.4 (2434) |
| Female | 19.0 (1466) | 11.0 (725) | 43.3 (3258) | 0.2 (18) | 26.6 (1864) |
| Race/ethnicity | |||||
| Non-Hispanic White | 18.9 (1464) | 17.7 (1279) | 26.5 (2018) | 0.2 (16) | 36.7 (2717) |
| Non-Hispanic Black | 14.5 (422) | 6.8 (206) | 61.7 (1780) | 0.4 (13) | 16.6 (498) |
| Hispanic | 21.9 (483) | 10.3 (217) | 37.9 (805) | 0.3 (—) | 29.7 (667) |
| Non-Hispanic Asian | 38.0 (335) | 6.7 (74) | 22.5 (166) | 0.2 (—) | 32.6 (294) |
| Non-Hispanic American Indian | 17.9 (37) | 16.5 (37) | 33.1 (91) | 0.0 (0) | 32.6 (84) |
| Non-Hispanic other race | 18.6 (25) | 13.3 (16) | 26.4 (41) | 0.0 (0) | 41.7 (38) |
| Family structure | |||||
| 2 biological parents | 23.6 (1866) | 16.7 (1073) | 26.1 (2105) | 0.1 (10) | 33.5 (2361) |
| Other 2 parent | 12.4 (323) | 13.0 (332) | 39.0 (993) | 0.3 (10) | 35.3 (866) |
| Single mom | 15.1 (461) | 12.6 (313) | 43.5 (1326) | 0.6 (18) | 28.3 (781) |
| Single dad | 15.5 (59) | 11.9 (59) | 36.6 (142) | 0.0 (0) | 36.0 (136) |
| Other | 10.9 (57) | 8.2 (52) | 52.7 (335) | 0.5 (—) | 27.7 (154) |
| Parent education | |||||
| < high school | 20.4 (362) | 8.8 (136) | 43.8 (770) | 0.3 (—) | 26.7 (447) |
| High-school diploma or general equivalency diploma | 13.9 (529) | 11.8 (388) | 40.1 (1441) | 0.3 (13) | 33.9 (1112) |
| Some college | 18.1 (721) | 13.9 (500) | 33.5 (1472) | 0.2 (—) | 34.4 (1347) |
| ≥ College graduate | 24.5 (1154) | 20.3 (805) | 22.9 (1218) | 0.3 (12) | 32.0 (1392) |
| Pubertal timing | |||||
| Early | 15.1 (880) | 14.6 (743) | 35.0 (2028) | 0.3 (13) | 35.0 (1853) |
| Typical | 20.9 (1195) | 16.0 (760) | 30.6 (1800) | 0.3 (19) | 32.2 (1644) |
| Late | 24.1 (691) | 12.3 (326) | 34.9 (1073) | 0.2 (—) | 28.5 (801) |
| Age, y | |||||
| 24–29 | 18.0 (1785) | 15.8 (1333) | 33.4 (3315) | 0.2 (26) | 32.6 (2940) |
| ≥ 30 | 22.0 (981) | 12.1 (496) | 33.1 (1586) | 0.4 (15) | 32.5 (1358) |
Note. Dash indicates that cell size is too small to be displayed. Percentages reflect row percents. Bivariate tests and multivariate modeling were not conducted because of the small cell sizes for some combinations. The sample size was n = 13 835.