Odds of condom use and STD acquisition
| A. HC vs No HC aOR (95% CI) | B. HC vs Condom Only aOR (95% CI) | C. Dual Use vs Condom Only aOR (95% CI) | |
| Females | |||
| Condom use at last sex | 1.18 (0.83 to 1.68) | 0.49 (0.33 to 0.71))‡ | 1.23 (0.79 to 1.93) |
| Frequent condom use | 1.41 (0.97 to 2.05) | 0.29 (0.19 to 0.45)‡ | 1.55 (0.88 to 2.73) |
| STD | 0.50 (0.25 to 0.97)§ | 0.67 (0.32 to 1.38) | 0.85 (0.37 to 1.91) |
| Males | |||
| Condom use at last sex | 0.70 (0.47 to 1.06) | 0.41 (0.26 to 0.62)‡ | 1.11 (0.79 to 1.93) |
| Frequent condom use | 0.62 (0.39 to 0.96)§ | 0.14 (0.08 to 0.25)‡ | 0.53 (0.27 to 1.06) |
| STD | 1.16 (0.41 to 3.31) | 1.88 (0.66 to 5.42) | 2.07 (0.62 to 6.93) |
| Total | |||
| Condom use at last sex | 0.95 (0.73 to 1.25) | 0.45 (0.34 to 0.60)‡ | 1.18 (0.82 to 1.70) |
| Frequent condom use | 1.00 (0.75 to 1.34) | 0.22 (0.15 to 0.31)‡ | 1.04 (0.67 to 1.63) |
| STD | 0.64 (0.36 to 1.14) | 0.95 (0.52 to 1.75) | 1.08 (0.54 to 2.15) |
‡p≤0.0001, †p≤0.001, *p≤0.01, §p≤0.05.
Comparison A= HC (dual method + HC only) vs non-HC (condom only + non-contraceptive use) (n=1443); Comparison B=HC (dual method + HC only) vs condom only (n=1139); and Comparison C= dual method vs condom only (n=1006). aORs were adjusted by sex, age, race, relationship tenure, and number of partners per year of sexual activity (log scale); only significant covariates were retained in the final multivariate model.