Sensitivity, specificity, and positive predictive value (PPV) for gonococcal and chlamydial infections for different diagnostic algorithms for vaginal discharge, among 621 women, and comparing pregnant with non-pregnant women
| Total (n=621) | Non-pregnant (n=287) | Pregnant (n=334) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Algorithm | Sensitivity (%) | Specificity (%) | PPV (%) | Sensitivity (%) | Specificity (%) | PPV (%) | Sensitivity (%) | Specificity (%) | PPV (%) |
| All the above algorithms require the presence of vaginal discharge. | |||||||||
| A = algorithm as in use in Kenya (complaint of abdominal pain and abdominal tenderness on examination). | |||||||||
| B = modified Kenyan algorithm (complaint of abdominal discharge and no examination performed). | |||||||||
| C = WHO algorithm (risk score except for symptoms in partner) | |||||||||
| D = yellow or bloody discharge visible on examination of vagina. | |||||||||
| E = endocervical mucopus on speculum examination. | |||||||||
| F = risk score positive and/or yellow or bloody vaginal discharge visible. | |||||||||
| A | 42 | 63 | 18 | 47 | 57 | 20 | 36 | 69 | 15 |
| B | 50 | 58 | 18 | 53 | 52 | 20 | 45 | 63 | 16 |
| C | 59 | 61 | 22 | 66 | 54 | 24 | 50 | 67 | 18 |
| D | 45 | 68 | 21 | 55 | 71 | 30 | 33 | 66 | 13 |
| E | 42 | 73 | 22 | 43 | 76 | 29 | 41 | 70 | 17 |
| F | 78 | 42 | 20 | 85 | 38 | 24 | 70 | 46 | 16 |