TABLE 3.
Correlates of dual method use
| 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) | 1.01 (0.97, 1.05) | 1.01 (0.97, 1.06) | 1.01 (0.96, 1.06) |
| Race/ethnicity | |||
| White, non-Hispanic | — | — | — |
| Black, non-Hispanic | 0.74 (0.51, 1.07) | 0.87 (0.58, 1.29) | 0.87 (0.57, 1.33) |
| Hispanic | 0.72 (0.44, 1.18) | 0.76 (0.45, 1.26) | 0.78 (0.46, 1.32) |
| Other | 0.97 (0.64, 1.47) | 1.04 (0.68, 1.59) | 1.03 (0.66, 1.59) |
| Education | |||
| Less than high school | 0.35 (0.19, 0.64) | 0.48 (0.24, 0.95) | 0.46 (0.23, 0.94) |
| High school/GED | 0.59 (0.34, 1.01) | 0.78 (0.43, 1.41) | 0.63 (0.34, 1.17) |
| 2 year degree or some college | 0.81 (0.47, 1.39) | 0.98 (0.55, 1.74) | 0.74 (0.41, 1.34) |
| 4 year degree or more | — | — | — |
| Current smoker | 0.85 (0.62, 1.16) | 0.93 (0.66, 1.31) | 1.13 (0.77, 1.65) |
| Substance use | 0.74 (0.54, 1.01) | 0.69 (0.49, 0.97) | 0.67 (0.45, 0.98) |
| History of STI | 0.61 (0.44, 0.84) | 0.70 (0.49, 1.01) | 0.70 (0.48, 1.02) |
| History of unintended pregnancy | 0.84 (0.61, 1.15) | 0.99 (0.69, 1.41) | 0.93 (0.64, 1.36) |
| Hormonal contraceptive use | 1.77 (1.29, 2.43) | 1.62 (1.17, 2.24) | 1.86 (1.26, 2.76) |
| Male condoms | 0.99 (0.91, 1.07) | 1.08 (0.76, 1.52) | 1.54 (1.02, 2.33) |
| Lifetime number of sexual partners | |||
| 1 to 2 | — | — | — |
| 3 to 5 | 1.30 (0.79, 2.13) | 1.41 (0.84, 2.36) | 1.43 (0.85, 2.40) |
| 6 to 10 | 1.08 (0.63, 1.85) | 1.18 (0.68, 2.07) | 1.30 (0.72, 2.36) |
| 11 or more | 0.85 (0.50, 1.46) | 0.98 (0.54, 1.78) | 1.03 (0.54, 1.95) |
| Number of sexual partners in past month | |||
| 0 | 0.65 (0.39, 1.10) | 0.63 (0.37, 1.08) | 0.64 (0.35, 1.20) |
| 1 | — | — | — |
| 2 or more | 0.85 (0.54, 1.33) | 0.91 (0.57, 1.44) | 0.96 (0.59, 1.55) |
| New partner past 30 days | 1.09 (0.76, 1.55) | 1.12 (0.78, 1.62) | 1.10 (0.74, 1.66) |
| Sex after drinking | |||
| Never | — | — | — |
| 1 to 2 times | 0.90 (0.62, 1.32) | 0.90 (0.61, 1.33) | 0.96 (0.61, 1.50) |
| 3 or more times | 1.45 (0.98, 2.13) | 1.38 (0.92, 2.06) | 1.55 (0.97, 2.48) |
| Forced to have sex in past year | 1.00 (0.98, 1.02) | 1.00 (0.98, 1.03) | 1.02 (1.00, 1.05) |
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.