TABLE 4.
Correlates of biological outcomes of STI and/or unintended pregnancy
| Crude HRR (95% CI) | Adjusted for randomization, age, race/ethnicity, education, STI, pregnancy and recent partners HRR (95% CI) | Adjusted for all main effects and randomization HRR (95% CI) | |
|---|---|---|---|
| Age (continuous) | 0.96 (0.92, 1.00) | 0.93 (0.89, 0.97) | 0.93 (0.89, 0.97) |
| Race/ethnicity | |||
| White, non-Hispanic | — | — | — |
| Black, non-Hispanic | 1.92 (1.42, 2.60) | 1.41 (1.01, 1.97) | 1.44 (1.02, 2.02) |
| Hispanic | 1.40 (0.91, 2.16) | 1.34 (0.88, 2.06) | 1.29 (0.80, 2.07) |
| Other | 1.10 (0.74, 1.63) | 0.89 (0.60, 1.32) | 0.85 (0.57, 1.28) |
| Education | |||
| Less than high school | 4.56 (2.05, 9.70) | 2.55 (1.15, 5.67) | 2.01 (0.88, 4.57) |
| High school/GED | 3.07 (1.42, 6.64) | 1.87 (0.85, 4.11) | 1.52 (0.68, 3.40) |
| 2 year degree or some college | 1.35 (0.60, 3.08) | 1.03 (0.45, 2.36) | 0.91 (0.39, 2.10) |
| 4 year degree or more | — | — | — |
| Current smoker | 1.14 (0.85, 1.51) | 1.08 (0.79, 1.46) | 1.13 (0.80, 1.58) |
| Substance use | 1.08 (0.81, 1.45) | 1.04 (0.76, 1.43) | 1.07 (0.76, 1.55) |
| History of STI | 2.02 (1.50, 2.71) | 1.71 (1.23, 2.38) | 1.81 (1.28, 2.57) |
| History of unintended pregnancy | 2.02 (1.50, 2.72) | 1.82 (1.31, 2.52) | 2.00 (1.42, 2.80) |
| Hormonal contraceptive use | 0.62 (0.45, 0.86) | 0.65 (0.46, 0.91) | 0.56 (0.39, 0.81) |
| Male condoms | 1.01 (0.99, 1.03) | 0.92 (0.65, 1.29) | 0.80 (0.55, 1.16) |
| Lifetime number of sexual partners | |||
| 1 to 2 | — | — | — |
| 3 to 5 | 1.06 (0.67, 1.67) | 1.16 (0.73, 1.85) | 1.02 (0.63, 1.65) |
| 6 to 10 | 1.08 (0.66, 1.76) | 1.10 (0.67, 1.82) | 0.92 (0.54, 1.58) |
| 11 or more | 1.03 (0.63, 1.66) | 0.80 (0.48, 1.34) | 0.65 (0.37, 1.12) |
| Number of sexual partners in past month | |||
| 0 | 0.67 (0.41, 1.08) | 0.60 (0.36, 1.00) | 0.53 (0.30, 0.91) |
| 1 | — | — | — |
| 2 or more | 1.59 (1.10, 2.30) | 1.45 (0.99, 2.13) | 1.56 (1.05, 2.32) |
| New partner past 30 days | 1.12 (0.81, 1.55) | 1.04 (0.75, 1.45) | 0.92 (0.63, 1.32) |
| Sex after drinking | |||
| Never | — | — | — |
| 1 to 2 times | 1.01 (0.72, 1.40) | 1.09 (0.77, 1.54) | 0.87 (0.58, 1.30) |
| 3 or more times | 1.25 (0.86, 1.80) | 1.40 (0.96, 2.05) | 1.22 (0.80, 1.86) |
| Forced to have sex in past year | 1.01 (0.99, 1.03) | 1.00 (0.98, 1.02) | 0.99 (0.93, 1.06) |
Peipert. Tailored intervention to increase dual-contraceptive method use: a randomized trial to reduce unintended pregnancies and sexually transmitted infections. Am J Obstet Gynecol 2008.