TABLE 2.
Behavioral and biological outcomes by study group (24 months of follow-up)
| Intervention N = 272 | Control N = 270 | Unadjusted HRR (95% CI) | Adjusted for propensity scorea | Adjusted for dual method | Adjusted for any dual method use & propensity score | |
|---|---|---|---|---|---|---|
| Reported any dual method use | 86 (32) | 71 (26) | 1.38 (1.00, 1.89) | 1.70 (1.09, 2.66) | — | — |
| Consistent condom use | 124 (46) | 124 (46) | 1.14 (0.89, 1.47) | 1.26 (0.88, 1.79) | — | — |
| Any STI or unintended pregnancy | 95 (35) | 93 (34) | 1.08 (0.81, 1.44) | 1.19 (0.79, 1.79) | 1.14 (0.86, 1.52) | 1.28 (0.85, 1.93) |
| Unplanned pregnancy | 60 (22) | 62 (23) | 1.00 (0.70, 1.43) | 1.17 (0.71, 1.95) | 1.04 (0.73, 1.48) | 1.22 (0.73, 2.04) |
| Any STI | 43 (16) | 44 (16) | 1.06 (0.69, 1.61) | 1.29 (0.70, 2.36) | 1.11 (0.73, 1.70) | 1.40 (0.76, 2.58) |
| Chlamydia | 27 (10) | 26 (10) | 1.13 (0.66, 1.94) | 1.31 (0.61, 2.82) | 1.19 (0.69, 2.04) | 1.42 (0.66, 3.07) |
| Gonorrhea | 12 (4) | 13 (5) | 0.96 (0.44, 2.11) | 1.83 (0.61, 5.50) | 0.97 (0.44, 2.14) | 1.86 (0.62, 5.64) |
| Trichomonas | 13 (5) | 9 (3) | 1.52 (0.65, 3.55) | 2.41 (0.72, 8.02) | 1.66 (0.71, 3.88) | 2.78 (0.83, 9.27) |
| PID | 8 (3) | 4 (1) | 2.13 (0.64, 7.07) | 1.03 (0.20, 5.19) | 2.39 (0.72, 7.96) | 1.23 (0.24, 6.23) |
a
Adjusts for important covariates and relevant 2-way interactions.
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.