Associations between participant characteristics and clinically diagnosed or missed STIs*
| aPR | 95% CI | |
| Clinically diagnosed vaginitis and/or cervicitis | ||
| Any positive lab result† | 1.07 | 0.61 to 1.90 |
| Positive PSA test | 1.42 | 0.91 to 2.20 |
| Unprotected sex in 2 days† | 0.96 | 0.52 to 1.77 |
| Age (increase 1 year) | 0.98 | 0.94 to 1.01 |
| Parity (increase of 1) | 0.98 | 0.83 to 1.17 |
| Single vs cohabiting, married, divorced | 0.99 | 0.59 to 1.67 |
| Did not complete high school | 1.19 | 0.73 to 1.93 |
| Four or more alcoholic drinks† | 1.60 | 0.68 to 3.80 |
| Ever received money or gifts in exchange for sex | 1.09 | 0.37 to 3.21 |
| Hormonal contraception in past month | 1.65 | 1.07 to 2.54 |
| More than one partner in past month† | 1.18 | 0.50 to 2.77 |
| Missed cases of laboratory-confirmed gonorrhoea, chlamydia, trichomonas‡ | ||
| Positive PSA test | 0.94 | 0.75 to 1.18 |
| Unprotected sex in 2 days | 1.14 | 0.90 to 1.46 |
| Age (increase 1 year) | 0.98 | 0.97 to 1.00 |
| Parity (increase of 1)† | 1.03 | 0.96 to 1.09 |
| Single vs cohabiting, married, divorced† | 0.97 | 0.82 to 1.15 |
| Did not complete high school | 1.17 | 0.94 to 1.45 |
| Four or more alcoholic drinks | 0.91 | 0.54 to 1.55 |
| Ever received money or gifts in exchange for sex† | 0.88 | 0.61 to 1.23 |
| Hormonal contraception in past month | 1.18 | 0.95 to 1.46 |
| More than one partner in past month | 1.22 | 0.87 to 1.70 |
*Analysed with generalised estimating equations for repeated measures, adjusting for study arm.
†Additionally adjusting for baseline STI status.
‡Defined as cases that were clinically diagnosed as healthy but had a laboratory-confirmed STI.
aPR, adjusted prevalence ratio; PSA, prostate-specific antigen; STI, sexually transmitted infection.