Trends over time in sexually transmitted infections detected among antenatal clinic attenders screened in Nairobi, 1992–1999, n=5459
| Survey 1 | Survey 2 | Survey 3 | Survey 4 | Survey 5 | Survey 6 | p Value* | |
|---|---|---|---|---|---|---|---|
| *χ2 test for trend; †chlamydia serology is not available for survey 5. | |||||||
| Gonorrhoea (cervical swab) | 5.3% | 5.0% | 3.6% | 3.5% | 3.9% | 1.7% | <0.001 |
| Syphilis (serology) | 5.4% | 5.2% | 4.4% | 3.9% | 3.7% | 2.5% | <0.001 |
| Chlamydial infection (serology), all women | 32.9* | 30.8% | 20.5% | 22.5% | † | 17.0% | <0.001 |
| Chlamydial infection (serology), women under age 20 | 34.3% | 29.3% | 18.0% | 19.4% | † | 17.0% | <0.001 |
| HIV infection (serology), all women | 14.7% | 19.0% | 17.9% | 17.5% | 18.0% | 18.7% | Not significant |
| HIV infection (serology), women under age 20 | 15.0% | 20.8% | 20.8% | 14.4% | 15.1% | 14.1% | 0.03, Surveys 2–6 |