Relative risk ratios of C trachomatis PCR test result patterns dependent on variables in first visit by multivariate analysis
| Relative risk of test result patterns* for adjusted variables of interest | |||||
|---|---|---|---|---|---|
| Variable | All negative (n=3043) RRR† | 1 Positive (n=650) RRR (95% CI) | p Value | >1 Positive (n=167) RRR (95% CI) | p Value |
| *Compared with all negative test results. | |||||
| †RRR = relative risk ratio; CI = confidence interval. | |||||
| Age (years) | |||||
| <25 | 1 | 4.0 (3.3–4.9) | <0.001 | 8.9 (5.6–14.3) | <0.001 |
| ≥25 | 1 | 1 | 1 | ||
| Reason for clinic visit | |||||
| STD contact | 1 | 1.1 (0.8–1.6) | 0.4 | 1.3 (0.8–2.2) | 0.3 |
| STD symptoms | 1 | 1.1 (0.9–1.5) | 0.3 | 1.1 (0.7–1.7) | 0.8 |
| “Other” | 1 | 1.8 (1.2–2.7) | 0.005 | 2.2 (1.1–4.3) | 0.02 |
| Screening | 1 | 1 | 1 | ||
| Clinic type | |||||
| Family planning | 1 | 1.3 (0.9–1.9) | 0.1 | 1.6 (0.8–3.0) | 0.1 |
| STD | 1 | 1.6 (1.1–2.3) | 0.007 | 2.2 (1.2–4.2) | 0.01 |
| School | 1 | 1 | 1 | ||
| Risk behaviours | |||||
| Inconsistent condom use | 1 | 1.3 (1.0–1.6) | 0.04 | 1.2 (0.8–1.9) | 0.3 |
| >1 sex partner | 1 | 1.1 (0.9–1.5) | 0.4 | 1.5 (0.9–2.4) | 0.09 |
| New sex partner | 1 | 1.1 (0.8–1.4) | 0.5 | 0.9 (0.5–1.4) | 0.6 |
| Self reported STD history | |||||
| Previous syphilis infection | 1 | 0.4 (0.2–0.8) | 0.008 | 0.9 (0.3–2.2) | 0.8 |