Table 3.
Sensitivity, specificity, negative and positive predictive values obtained with coproparasitological techniques employed in the group of infected patients
| Group of infections/techniques | No. (%) | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) |
|---|---|---|---|---|---|
| Infections with protozoa in general (n = 32) | |||||
| Direct wet mount | 25 (78.12) | 68.13 (62.24–94.01) | 100 (99.0–100) | 100 (98.0–100) | 87.72 (78.32–97.12) |
| Paratest® | 25 (78.12) | 68.13 (62.24–94.01) | 100 (99.0–100) | 100 (98.0–100) | 87.72 (78.32–97.12) |
| Ritchie | 32 (100) | 100 (98.44–100) | 100 (99.0–100) | 100 (98.4–100) | 100 (99.0–100) |
| P = 0.02 | |||||
| Infections with pathogenic protozoa (n = 10) | |||||
| Direct wet mount | 8 (80.0) | 80.00 (50.21–100) | 100 (99.31–100) | 100 (93.7–100) | 97.30 (92.23–100) |
| Paratest® | 9 (90.0) | 90.00 (66.41–100) | 100 (99.31–100) | 100 (94.4–100) | 98.63 (95.28–100) |
| Ritchie | 10 (100) | 100 (95–100) | 100 (99.31–100) | 100 (95–100) | 100 (99.31–100) |
| P = 0.33 | |||||
| Infections with commensals (n = 26) | |||||
| Direct wet mount | 21 (80.77) | 80.77 (63.70–97.84) | 100 (99.11–100) | 100 (97.6–100) | 91.80 (84.10–99.51) |
| Paratest® | 20 (76.92) | 76.92 (58.81–95.04) | 100 (99.11–100) | 100 (97.5–100) | 90.32 (82.16–98.49) |
| Ritchie | 26 (100) | 100 (98.08–100) | 100 (99.11–100) | 100 (98.1–100) | 100 (99.11–100) |
| P = 0.04 | |||||
CI confidence intervals, PPV positive predictive value, NPV negative predictive value