TABLE 1.
Comparison of diagnostic tests of 428 specimens for T. vaginalisa
| Assay or test | No. of tests
|
% Sensitivity (95% CI) | % Specificity (95% CI) | % Predictive value
|
||||
|---|---|---|---|---|---|---|---|---|
| True positive | False positive | False negative | True negative | Positive | Negative | |||
| Wet mount | 26 | 0 | 28 | 374 | 48.2 (34.4-62.2) | 100 (99-100) | 100 | 93 |
| Xenostrip-TV | 36 | 0 | 18 | 374 | 66.7 (52.6-78.9) | 100 (99-100) | 100 | 95.4 |
| PCR | 54 | 3 | 0 | 371 | 100 (93.4-100) | 99.2 (97.7-99.8) | 94.7 | 100 |
a
The gold standard used was a positive wet mount confirmed by PCR with primers TVK3 and TVK7 and/or a positive PCR test confirmed by a second PCR assay with primers TVA5-1 and TVA6 (n = 54). CI, confidence interval.