Independent risk factors for STI in univariate and multivariate models
| Risk factor | Category | N/N | STI positive (%) | OR (95% CI) univariate analysis* | P value | OR (95% CI) multivariate analysis | P value |
| Age (years) | 16–19 | 27/140 | 19.3 | 2.14 (1.00 to 4.57) | 0.022 | 2.88 (1.27 to 6.51) | |
| 20–25 | 19/120 | 15.8 | 1.44 (0.65 to 3.19) | 1.89 (0.82 to 4.37) | 0.005 | ||
| 26–35 | 13/112 | 11.6 | 0.99 (0.42 to 2.31) | 1.21 (0.50 to 2.92) | |||
| 36+ | 12/106 | 11.3 | 1.0 | 1.0 | |||
| Sex | Female | 62/283 | 21.9 | 5.80 (2.81 to 11.98) | <0.001 | 14.06 (6.0 to 35.69) | <0.001 |
| Previous STI optimally treated | Yes | 2/38 | 5.3 | 0.27 (0.07 to 1.27) | 0.082 | 0.20 (0.04 to 0.91) | 0.038 |
| Concurrent sexual partner | Yes | 18/120 | 15.0 | 4.56 (2.09 to 9.96) | <0.001 | 7.69 (2.09 to 24.2) | <0.001 |
| Number of partners in 1 year | 0 | 7/55 | 12.7 | 1.0 | 0.05 | 1.0 | 0.168 |
| 1 | 49/298 | 16.4 | 0.81 | 0.77 (0.30 to 1.99) | |||
| >1 | 15/108 | 13.9 | 2.65 | 0.38 (0.06 to 2.34) | |||
| Education | None | 12/58 | 20.7 | 1.0 | 0.684 | ||
| Primary | 14/119 | 11.8 | 0.55 (0.23 to 1.24) | ||||
| Secondary | 45/289 | 15.6 | 0.82 (0.36 to 1.87) | ||||
| Tertiary | 0/12 | 0 | – | ||||
| Income | Yes | 5/80 | 6 | 0.84 (0.30 to 2.35) | 0.744 | ||
| Religion | None | 30/166 | 18.1 | 1 | 0.337 | ||
| Catholic | 23/145 | 15.9 | 0.85 (0.45 to 1.59) | ||||
| Protestant | 17/98 | 17.4 | 1.27 (0.62 to 2.58) | ||||
| Muslim | 1/43 | 2.3 | 0.15 (0.02 to 1.14) | ||||
| Married or living with partner | Yes | 63/355 | 17.8 | 0.84 (0.35 to 2.01) | 0.703 | ||
| Age of sexual debut<16 | Yes | 28/157 | 17.8 | 0.85 (0.55 to 1.32) | 0.481 | ||
| Previous STI | Yes | 11/91 | 12.1 | 1.10 (0.53 to 2.27) | 0.807 | ||
| Condom use | Never | 19/143 | 13.3 | 1 | 0.462 | ||
| Sometimes | 35/174 | 20.1 | 1.49 (0.78 to 2.85) | ||||
| Usually | 4/29 | 13.8 | 1.33 (0.40 to 4.47) | ||||
| Often | 13/75 | 17.3 | 1.40 (0.61 to 3.23) | ||||
| Number of pregnancies | 0 | 18/66 | 27.3 | 1 | 0.537 | ||
| 1 | 23/97 | 23.7 | 0.92 (0.42 to 2.02) | ||||
| 2 to 4 | 12/60 | 20.0 | 0.85 (0.28 to 2.61) | ||||
| >4 | 9/60 | 15.0 | 0.65 (0.17 to 2.44) | ||||
| Pregnant at time of study | Yes | 9/61 | 14.8 | 0.56 (0.26 to 1.22) | 0.143 | ||
| Current STI symptoms | Yes | 4/19 | 21.1 | 1.85 (0.55 to 6.21) | 0.317 |
*For all other variables, the regression was adjusted for age and sex.
STI, sexually transmitted infection.