Odds ratios for selected behavioural factors, in females
| Prevalence of active syphilis | Incidence of TPHA seroconversion | |||||||
|---|---|---|---|---|---|---|---|---|
| Variables | Cases | Controls | Adjusted OR* (95% CI) | Cases | Controls | Adjusted OR† (95% CI) | ||
| *Odds ratio adjusted for age, community of residence, education, age at first sex, perceived risk of STD, current marital status. | ||||||||
| †Odds ratio adjusted for age, community of residence, lived away from the community in the past 2 years (one community dropped). | ||||||||
| ‡Significance calculated with test for trend. | ||||||||
| §95% CI for ever use of condom is not estimable for the incidence study. | ||||||||
| Number participated | 236 | 555 | 91 | 341 | ||||
| Sex partners ever‡ | ||||||||
| None or 1 | 57 | 188 | 1 | p=0.4 | 12 | 46 | 1 | p=0.8 |
| 2–4 | 125 | 264 | 1.03 (0.65–1.62) | 38 | 147 | 1.08 (0.48–2.42) | ||
| 5–9 | 37 | 83 | 0.93 (0.51–1.70) | 23 | 79 | 1.31 (0.52–3.29) | ||
| 10 or more | 17 | 20 | 2.20 (0.90–5.38) | 18 | 69 | 1.09 (0.42–2.85) | ||
| Sex partners in past 1 year‡ | ||||||||
| None or 1 | 204 | 494 | 1 | p=0.9 | 77 | 296 | 1 | p=0.7 |
| 2 | 22 | 42 | 0.92 (0.49–1.73) | 7 | 35 | 0.71 (0.28–1.78) | ||
| 3 or more | 10 | 17 | 1.23 (0.46–3.27) | 7 | 7 | 1.93 (0.53–7.00) | ||
| Ever used a condom | ||||||||
| No | 229 | 539 | 1 | p=0.75 | 91 | 326 | ||
| Yes | 7 | 16 | 0.85 (0.31–2.32) | 0 | 15 | —§ | ||
| Perceived risk of STD | ||||||||
| None/slight | 48 | 149 | 1 | p<0.001 | 33 | 143 | 1 | p=0.14 |
| Moderate | 98 | 242 | 1.37 (0.86–2.18) | 17 | 96 | 0.78 (0.38–1.64) | ||
| High | 41 | 48 | 3.57 (1.91–6.68) | 18 | 29 | 2.05 (0.92–4.56) | ||
| Don't know | 49 | 116 | 1.46 (0.81–2.62) | 23 | 73 | 1.41 (0.71–2.78) | ||
| Casual sex partner in past year | ||||||||
| No | 210 | 510 | 1 | p=0.45 | 61 | 269 | 1 | p=0.76 |
| Yes | 26 | 45 | 1.26 (0.69–2.32) | 29 | 68 | 1.10 (0.60–2.02) | ||
| Age at first sex | ||||||||
| <15 years | 72 | 120 | 1 | p=0.03 | 22 | 82 | 1 | p=0.13 |
| 15–19 years | 118 | 311 | 0.63 (0.42–0.93) | 65 | 209 | 1.00 (0.54–1.83) | ||
| 20+ years | 9 | 35 | 0.44 (0.19–1.02) | 1 | 22 | 0.18 (0.02–1.52) | ||