PAF of PID associated with chlamydia and gonorrhoea infection
| Overall | No symptoms at triage* | Symptoms at triage† | ||||
|---|---|---|---|---|---|---|
| PAF | Adjusted PAF‡ | PAF | Adjusted PAF‡ | PAF | Adjusted PAF‡ | |
| % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | |
| Chlamydia-tested | ||||||
| Chlamydia positive | 14.6 (10.4 to 18.6) | 14.1 (9.9 to 18.0) | 28.3 (12.2 to 41.4) | 27.8 (11.6 to 41.0) | 13.6 (9.5 to 17.5) | 13.2 (9.1 to 17.1) |
| Chlamydia+ gonorrhoea-tested subset | ||||||
| Chlamydia and/or gonorrhoea positive | 14.9 (10.7 to 18.9) | 14.2 (10.0 to 18.3) | 25.5 (0.9 to 38.8) | 24.4 (8.0 to 37.9) | 14.1 (9.9 to 18.1) | 13.6 (9.4 to 17.6) |
| Chlamydia positive only | 13.0 (9.0 to 16.8) | 12.4 (8.4 to 16.2) | 19.6 (4.8 to 32.0) | 18.5 (3.5 to 31.2) | 12.6 (8.6 to 16.5) | 12.2 (8.2 to 16.1) |
| Gonorrhoea positive only | 0.9 (−0.1 to 1.9) | 0.9 (−0.1 to 1.8) | 1.9 (−2.3 to 5.8) | 1.8 (−2.3 to 5.8) | 0.8 (−0.1 to 1.7) | 0.8 (0.1 to 1.7) |
| Chlamydia and gonorrhoea positive | 1.0 (0.1 to 1.9) | 1.0 (0.0 to 1.9) | 4.1 (−1.4 to 9.3) | 4.1 (−1.3 to 9.2) | 0.6 (−0.2 to 1.4) | 0.6 (−0.2 to 1.4) |
*Chlamydia infection was detected in 746 (8.9%, 95% CI 8.3% to 9.6%) and PID was diagnosed in 49 (0.6%, 95% CI 0.4% to 0.8%) of 8348 chlamydia-tested women not reporting symptoms at triage.
†Chlamydia infection was detected in 533 (7.3%, 95% CI 6.7% to 7.9%) and PID was diagnosed in 387 (5.3% 95% CI 4.8% to 5.8%) of 7342 chlamydia-tested women reporting symptoms at triage.
‡Adjusted for age group, contraception, condom use, last 3 months.
PAF, population attributable fraction; PID, pelvic inflammatory disease.