Table 2 Accuracy of microscopy, latex agglutination, and diamond’s media compared with PCR for detecting T. vaginalis
PCR | Accuracy measure (95% CI) | |||||
|---|---|---|---|---|---|---|
Positive | Negative | Total | ||||
Microcopy | Positive | 251 | 1 | 252 | Sensitivity | 99.2 (97.4-100.0) |
Negative | 2 | 43 | 45 | Specificity | 97.7 (89.3-100.0) | |
Total | 253 | 44 | 297 | Positive predictive value | 99.6 (98.1-100.0) | |
Negative predictive value | 95.5 (86.1-99.1) | |||||
Latex agglutination | Positive | 252 | 5 | 257 | Sensitivity | 99.6 (98.1-100.0) |
Negative | 1 | 39 | 40 | Specificity | 88.6 (76.6-95.7) | |
Total | 253 | 44 | 297 | Positive predictive value | 98.0 (95.7-99.3) | |
Negative predictive value | 97.5 (88.3-100.0) | |||||
Diamond’s media | Positive | 253 | 0 | 253 | Sensitivity | 100.0 (98.8-100.0) |
Negative | 6 | 38 | 44 | Specificity | 86.4 (73.8-94.3) | |
Total | 259 | 38 | 297 | Positive predictive value | 97.6 (95.2-99.1) | |
Negative predictive value | 100 (92.4-100.0) | |||||