Performance of diagnosis of cervical infections based on scores derived from combinations of clinical findings among sex workers
| N gonorrhoeae | C trachomatis | M genitalium | NG, CT, MG | |
|---|---|---|---|---|
| PPV, positive predictive value; NPV, negative predictive value. | ||||
| Score defined as positive if two or more of the following signs are present: cervical discharge, pus on swab, bleeding after sampling, inflammatory cervix, cervical motion tenderness on examination | ||||
| Sensitivity | 51/119 (43%) | 9/25 (36%) | 53/206 (26%) | 86/298 (29%) |
| Specificity | 567/657 (86%) | 619/751 (82%) | 482/570 (85%) | 423/478 (88%) |
| PPV | 51/141 (36%) | 9/141 (6%) | 53/141 (38%) | 86/141 (61%) |
| PPV/prevalence | 2.26 | 1.88 | 1.43 | 1.58 |
| NPV | 567/635 (89%) | 619/635 (97%) | 482/635 (76%) | 423/635 (67%) |
| Score defined as positive if one or more of the following signs are present: pus on swab, bleeding after sampling, inflammatory cervix, cervical motion tenderness on examination | ||||
| Sensitivity | 57/119 (48%) | 10/25 (40%) | 61/206 (30%) | 97/298 (33%) |
| Specificity | 545/657 (83%) | 592/751 (79%) | 462/570 (81%) | 406/478 (85%) |
| PPV | 57/169 (34%) | 10/169 (6%) | 61/169 (36%) | 97/169 (57%) |
| PPV/prevalence | 2.11 | 1.74 | 1.37 | 1.48 |
| NPV | 545/607 (90%) | 592/607 (98%) | 462/607 (76%) | 406/607 (67%) |