Table 1

Prediction of pregnancy at 6 months and 12 months with multivariate regression (n=560)

Risk ratio (95% CI)p Value
Outcome: pregnancy at 6 months
 Under-report semen exposure3.23 (1.61 to 6.45)***
 Oral contraception0.45 (0.14 to 1.43)
 Coital frequency past 60 days1.02 (1.01 to 1.04)**
 Proportion condom use past 60 days0.54 (0.25 to 1.16)
 Item non-response: coital frequency0.55 (0.15 to 1.99)
Outcome: pregnancy at 12 months
 Under-report semen exposure2.21 (0.94 to 5.20)*
 Oral contraception0.17 (0.02 to 1.17)*
 Coital frequency past 60 days1.03 (1.01 to 1.04)****
 Proportion condom use past 60 days0.60 (0.28 to 1.29)
 Item non-response: coital frequency1.38 (0.58 to 3.26)
  • Item non-response are respondents who did not report coital frequency in the past 60 days; for these item non-responders, condom use in the past 60 days was imputed from condom use in the past 14 days for those who answered that question. Predictors of pregnancy were measured in the survey prior to pregnancy.

  • *p≤0.1, **p≤0.01, ***p≤0.001, ****p≤0.0001.