Table 4.
Conditional effects of ECP use on the prevalence of risky sex in subpopulations based on significant interactions
| Recent ECP Use | History of ECP Use | |
|---|---|---|
| Subpopulation | Relative Riskc (95% CI) |
Relative Riskd (95% CI) |
| No History of STIa | 1.09 (0.89, 1.32) | 1.31 (1.04, 1.65) |
| History of STIa | 0.39 (0.15, 0.97) | 0.61 (0.29, 1.30) |
| Highly Effective Contraceptive Methodb | ---- | 1.45 (1.05, 2.01) |
| No Highly Effective Contraceptive Methodb | ---- | 0. 95 (0.76, 1.17) |
ECP, emergency contraceptive pill; STI, sexually transmitted infection; CI, confidence interval
a
In the year prior to enrollment according to self-report at enrollment visit.
b
Most effective contraceptive method used in the month preceding the follow-up visit.
c
Relative risk comparing those with recent ECP use to those without, adjusted for location, visit number, highly effective contraceptive method at follow-up and history of pregnancy at baseline.
d
Relative risk comparing ever ECP users with never users, adjusted for location, visit number, the lifetime number of male sexual partners and history of pregnancy at baseline.