Crude and adjusted odds ratios for demographic and sexual history variables associated with Chlamydia trachomatis infection using logistic regression analysis
| Inner city clinic (n=373) | Suburban clinic (n=478) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| No | % pos | Crude OR (95% CI) | Adjusted OR (95% CI) | Se | Sp | No | % pos | Crude OR (95% CI) | |
| Se = sensitivity; Sp = specificity. | |||||||||
| Only variables which were associated with infection (p value <0.1 in univariate analysis) were included in the multivariate logistic regression. | |||||||||
| Age | |||||||||
| Under 25 years | 273 | 6.2 | 5.4 (0.7 to 41.5) | 3.9 (0.5 to 31.2) | 98 | 24 | 171 | 1.8 | 1.1 (0.3 to 4.5) |
| 25 years or over | 83 | 1.2 | 302 | 1.7 | |||||
| Vaginal discharge | |||||||||
| Yes | 99 | 10.1 | 4.1 (1.5 to 11.1) | 2.8 (0.9 to 8.0) | 59 | 74 | 105 | 3.8 | 3.5 (0.9 to 14.3) |
| No | 263 | 2.7 | 358 | 1.1 | |||||
| Dysuria | |||||||||
| Yes | 19 | 0 | 34 | 2.9 | 1.8 (0.2 to 15.4) | ||||
| No | 346 | 4.6 | 433 | 1.6 | |||||
| Lower abdominal pain | |||||||||
| Yes | 64 | 4.7 | 1.0 (0.3 to 3.6) | 83 | 1.2 | 0.6 (0.8 to 5.4) | |||
| No | 303 | 4.6 | 380 | 1.8 | |||||
| Intermenstrual bleed | |||||||||
| Yes | 45 | 2.2 | 0.4 (0.1 to 3.3) | 48 | 2.1 | 1.2 (0.1 to 10.3) | |||
| No | 317 | 5.0 | 416 | 1.7 | |||||
| Postcoital bleeding | |||||||||
| Yes | 18 | 5.6 | 1.1 (0.1 to 9.1) | 34 | 2.9 | 1.8 (0.2 to 15.2) | |||
| No | 346 | 4.9 | 425 | 1.6 | |||||
| Dyspareunia | |||||||||
| Yes | 52 | 7.7 | 1.9 (0.6 to 6.1) | 72 | 0 | ||||
| No | 310 | 4.2 | 389 | 2.1 | |||||
| Any symptom | |||||||||
| Yes | 176 | 6.8 | 2.5 (0.9 to 7.3) | 217 | 2.3 | 1.9 (0.4 to 8.0) | |||
| No | 177 | 2.8 | 242 | 1.2 | |||||
| Barrier contraception | |||||||||
| Yes | 184 | 3.8 | 0.7 (0.3 to 1.9) | 221 | 2.3 | 1.8 (0.4 to 7.7) | |||
| No | 166 | 5.4 | 239 | 1.3 | |||||
| Recent partner change | |||||||||
| Yes | 102 | 9.8 | 4.6 (1.6 to 12.9) | 4.5 (1.5 to 13.8) | 63 | 73 | 85 | 3.5 | 3.4 (0.8 to 15.7) |
| No | 258 | 2.3 | 381 | 1.1 | |||||
| >4 partners ever | |||||||||
| Yes | 200 | 6.0 | 2.0 (0.7 to 5.7) | 259 | 1.9 | 2.0 (0.4 to 10.3) | |||
| No | 159 | 3.1 | 203 | 1.0 | |||||
| Last urine >2 hours | |||||||||
| Yes | 160 | 5.6 | 1.4 (0.5 to 3.6) | 160 | 2.5 | 2.5 (0.6 to 11.3) | |||
| No | 190 | 4.2 | 296 | 1.0 | |||||