TABLE 2.
Performance of Clearview Chlamydia MF (relative to PCR) with CS and VS specimens at the SHC in Iloilo Citya
| Yr | Total no. tested | Sample type | Sensitivity (%), 95% CI | Specificity (%), 95% CI | PPV (%), 95% CI | NPV (%), 95% CI |
|---|---|---|---|---|---|---|
| 2002 | 397 | CS | 56.2 (41/73), 44.8-67.6 | 99.4 (322/324), 98.5-100 | 95.4 (41/43), 89.1-100 | 91.2 (322/353), 88.3-94.2 |
| 2004 | 425 | CS | 51.2 (44/86), 40.6-61.7 | 98.8 (335/339), 97.7-100 | 91.7 (44/48), 83.9-99.5 | 88.9 (335/377), 85.7-92.0 |
| Total | 822 | CS | 53.5 (85/159), 45.7-61.2 | 99.1 (657/663), 98.4-99.8 | 93.4 (85/91), 88.3-98.5 | 90.0 (657/730), 87.8-92.2 |
| 2002 | 196 | SCVS | 25.0 (9/36), 10.9-39.2 | 93.8 (150/160), 90.0-97.5 | 47.4 (9/19), 24.9-69.8 | 84.7 (150/177), 79.4-90.0 |
| 2004 | 137 | CCVS | 40.0 (10/25), 20.8-59.2 | 97.3 (109/112), 94.3-100 | 76.9 (10/13), 54.0-99.8 | 87.9 (109/124), 82.2-93.6 |
| Total | 333 | SCVS and CCVS | 31.1 (19/61), 19.5-42.8 | 95.2 (259/272), 92.7-97.8 | 59.4 (19/32), 42.4-76.4 | 86.0 (259/301), 82.1-90.0 |
a
No significant difference in test performance between subsets of paired CS and VS specimens was apparent in 2004 (P = 0.2482; McNemar's test).