TABLE 3.
Diagnostic performance of the KK method and FECT to detect O. viverrini infection in stool samples from a cross-sectional community study, Khong District, Laos
| Method | Total no. of samples | No. of samples with O. viverrini diagnosis by PCRa
|
% (95% CI)
|
||||||
|---|---|---|---|---|---|---|---|---|---|
| Positive | Negative | Opisthorchis-like egg prevalence | Sensitivity | Specificity | Positive predictive value | Negative predictive value | Kappa | ||
| 3 KK slides positive | 91 | 53 (58) | 19 (33) | 79.1 (69.8-86.0) | 91.4 (81.0-97.1) | 42.4 (25.5-60.8) | 73.6 (61.9-83.3) | 73.7 (48.8-90.9) | 0.37 (0.18-0.57) |
| 1 KK slide positive | 108 | 43 (69) | 11 (39) | 50.0 (39.9-61.2) | 62.3 (49.8-73.7) | 71.8 (55.1-85.0) | 79.6 (66.5-89.4) | 51.9 (37.8-65.7) | 0.31 (0.14-0.49) |
| 1 FECT positive | 108 | 34 (69) | 3 (39) | 34.3 (24.5-44.7) | 49.3 (37.0-61.6) | 92.3 (79.1-98.4) | 91.9 (78.1-98.3) | 50.7 (38.6-62.8) | 0.35 (0.21-0.49) |
a
O. viverrini PCR prevalence of 63.9% (69/108; 95% CI, 54.1 to 72.9%). Values in parentheses are total numbers of the indicated type of samples.