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Demographics Characteristics (N=537)
| Mean age (range) | 18 yrs (12.4 to 21.9) |
| Mean age at 1st intercourse (SD) | 16.5 yrs (1.95) |
| Mean years since menarche (SD) | 5.8 yrs (2.2) |
| Mean number of lifetime sexual partners (SD) | 4.71 (6.22) |
| Race/ethnicity | |
| White | 31% |
| Asian/Pacific Islander | 16% |
| Black | 9% |
| Latina | 6% |
| Mixed/other | 38% |
| History of sexually transmitted infection prior to entry | 8.4% |
SD = standard deviation
