TABLE 4.
Logistic regression model of factors associated with either CT and/or NGa
| Predictor of CT and/or NG | No. | % | Multivariate final model (n = 496) |
|||
|---|---|---|---|---|---|---|
| Adj. odds ratio | Lower 95% CI | Upper 95% CI | Adj. P value | |||
| City | ||||||
| Ndola | 88 | 14 | Ref | |||
| Lusaka | 36 | 18 | 2.07 | 1.04 | 4.13 | 0.04 |
| Age group | ||||||
| Age 18–24 | 91 | 18 | 1.97 | 1.13 | 3.45 | 0.02 |
| Age 25+ | 30 | 10 | Ref | |||
| Education | ||||||
| No school or primary school only | 85 | 17 | 2.19 | 1.20 | 4.03 | 0.01 |
| Secondary school or higher | 38 | 13 | Ref | |||
| Unprotected sex (last 1–3 mo)b | ||||||
| None | 29 | 13 | ||||
| At least once | 62 | 19 | ||||
| Uses LARC method | ||||||
| No LARC | 72 | 14 | Ref | |||
| Uses implant or IUD | 48 | 18 | 1.65 | 0.99 | 2.75 | 0.06 |
| Trichomonas vaginalis (microscopy) | ||||||
| Positive | 13 | 36 | 3.96 | 1.53 | 10.28 | <0.01 |
| Negative | 106 | 14 | Ref | |||
| BV (Both KOH and clue cells) | ||||||
| Positive | 37 | 20 | 1.87 | 1.05 | 3.34 | 0.03 |
| Negative | 62 | 13 | Ref | |||
| New syphilis infection (based on RPR) | ||||||
| Yes | 8 | 38 | 4.58 | 1.63 | 12.93 | <0.01 |
| No | 88 | 16 | Ref | |||
a
Adj, adjusted; CI, confidence interval; CT, Chlamydia trachomatis; IUD, intrauterine device; KOH, potassium hydroxide; LARC, long-acting reversible contraception; NG, Neisseria gonorrhoeae; ref, reference group; RPR, rapid plasma reagin.
b
Pragmatically eliminated from the multivariate model.