Table 2.
Diagnostic accuracy of the stool kit, formalin-ethyl acetate concentration technique (FECT) and Kato-Katz (KK) in the diagnosis of Opisthorchis viverrini and overall parasitic infection in fecal samples using a combined result from the other two methods as a reference diagnosis
| Method | Sensitivitya | Specificitya | PPVa | NPVa |
|---|---|---|---|---|
| Opisthorchis viverrini | ||||
| Stool kit | 67.3 (52.9–79.8) | 93.9 (87.2–97.7) | 85.4 (72.4–92.8) | 84.4 (78.5–88.9) |
| FECT | 75.5 (61.1–86.7) | 91.1 (83.8–95.8) | 80.4 (68.4–88.7) | 88.5 (82.4–92.6) |
| KK | 66.0 (51.7–78.5) | 91.8 (84.4–96.4) | 81.4 (68.7–89.7) | 83.2 (77.2–87.9) |
| Overall parasites | ||||
| Stool kit | 72.7 (60.4–83.0) | 85.7 (76.4–92.4) | 80.0 (69.9–87.3) | 80.0 (72.8–85.7) |
| FECT | 74.2 (62.0–84.2) | 85.7 (76.4–92.4) | 80.3 (70.4–87.5) | 80.9 (73.6–86.6) |
| KK | 56.8 (44.7–68.2) | 94.7 (87.1–98.5) | 91.3 (79.9–96.5) | 69.2 (63.3–74.6) |
a% (95% CI), positive predictive value (PPV), negative predictive value (NPV)