TABLE 4.
Association Between Lifetime Substance Use Compositea and Selected Sexual Risk Factors for STI and HIV Infection, US High School Students, Youth Risk Behavior Surveillance System, 2011 to 2013
| Characteristic | Ever Had Sexual Intercourse | Had ≥4 Lifetime Sexual Partners | Currently Sexually Activeb | Did Not Use Condom at Last Intercoursec | Used Alcohol or Drugs Before Last Sexual Intercoursec | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n (%)d | aPRe | 95% CI | n (%)d | aPRe | 95% CI | n (%)d | aPRe | 95% CI | n (%)d | aPRe | 95% CI | n (%)d | aPRe | 95% CI | |
| Lifetime substance use | |||||||||||||||
| No substances | 1185 (15.2) | 0.22 | 0.20–0.25 | 241 (2.7) | 0.11 | 0.09–0.13 | 723 (9.4) | 0.20 | 0.17–0.23 | 222(31.3) | 0.70 | 0.60–0.81 | 0 | — | — |
| 1 substance, no NMUPD | 2805 (37.4) | 0.51 | 0.47–0.55 | 553 (6.9) | 0.26 | 0.22–0.32 | 1845 (24.3) | 0.47 | 0.43–0.52 | 613 (33.0) | 0.71 | 0.62–0.82 | 115 (6.7) | 0.25 | 0.19–0.35 |
| 2 substances, no NMUPD | 3867 (68.0) | 0.87 | 0.83–0.93 | 1242 (20.2) | 0.66 | 0.57–0.76 | 2827 (49.1) | 0.90 | 0.81–0.99 | 1034 (36.4) | 0.78 | 0.69–0.89 | 563 (19.9) | 0.72 | 0.59–0.89 |
| ≥3 substances, no NMUPD | 840 (75.7) | — | Referent | 322 (28.3) | — | Referent | 605 (53.0) | — | Referent | 274 (48.0) | — | Referent | 180 (28.6) | — | Referent |
| ≥3 substances, plus NMUPD | 1814 (87.8) | 1.14 | 1.08–1.21 | 1005 (49.6) | 1.61 | 1.41–1.84 | 1491 (73.0) | 1.32 | 1.21–1.44 | 758 (52.5) | 1.06 | 0.93–1.21 | 726 (48.4) | 1.57 | 1.28–1.92 |
a
Composite includes lifetime use of alcohol, marijuana, ≥1 more illicit drugs (can include cocaine, inhalants, heroin, methamphetamines, or ecstasy), and ever took prescription drugs without a doctor's prescription.
b
Had sexual intercourse with ≥1 person during the 3 mo before the survey.
c
Among students who were currently sexually active.
d
Sample n is unweighted; percentage is weighted.
e
Adjusted for sex, race/ethnicity, grade, and IDU.