Prevalence of STI/RTI pathogens and STI/HIV seromarkers by age
| Pathogen | Prevalence of positive laboratory test result by age group | Test for trend | ||||
|---|---|---|---|---|---|---|
| Age <20 (n=52) | Age 20–24 (n=210) | Age 25–29 (n=222) | Age 30+ (n=116) | All ages (n=600) | ||
| Genital swabs | ||||||
| N gonorrhoeae (NG) | 21.2% | 30.0% | 19.4% | 13.8% | 22.2% | (p<0.01) |
| C trachomatis (CT) | 17.3% | 15.7% | 9.9% | 9.5% | 12.5% | (p<0.01) |
| NG/CT | 36.5% | 37.6% | 26.1% | 20.7% | 30.0% | (p<0.01) |
| T vaginalis | 32.7% | 24.3% | 22.1% | 21.5% | 23.7% | (p=0.12) |
| C albicans | 63.5% | 61.6% | 61.9% | 56.9% | 60.5% | (p=0.64) |
| Bacterial vaginosis | 42.3% | 45.2% | 39.4% | 31.9% | 40.2% | (p=0.04) |
| T pallidum (ulcer) | 0.8% | |||||
| H ducreyi (ulcer) | 0.0% | |||||
| HSV (ulcer or blister) | 1.7% | |||||
| Serology | ||||||
| HIV | 46.2% | 71.9% | 68.0% | 70.7% | 68.0% | (p<0.01) |
| TPPA+ve | 26.9% | 41.9% | 46.4% | 50.0% | 44.2% | (p<0.01) |
| TPPA+/RPR+ (all titres) | 17.3% | 16.7% | 18.0% | 16.4% | 17.2% | (p=1.0) |
| TPPA+/RPR+ (titre⩾1:8) | 11.5% | 10.5% | 6.8% | 5.2% | 8.2% | (p=0.07) |
| HSV-2 | 59.6% | 88.1% | 90.1% | 89.7% | 86.8% | (p<0.001) |