Table 2.
Comparative indicators of Parascreen™, when using PCR and EM as gold standards.
| gold standard | Results by Parascreen™ | ||||||
|---|---|---|---|---|---|---|---|
|
Plasmodium Species |
Sensitivity [%(95%CI)]a |
Specificity [%(95%CI)] |
PPVb [%(95%CI)] |
PPNc [%(95%CI)] |
Likehood ratio | ||
| Positive test | Negative test | ||||||
| EM | non-P. falciparum | 77.1 (67.0-84.4) |
97.6 (94.8-98.9) |
91.4 (82.5-96.0) |
92.7 (89.0-95.3) |
32 | 0.22 |
| P. falciparum | 53.5 (30.1-75.2) |
98.7 (96.8-99.5) |
66.7 (39.1-86.2) |
97.8 (95.6-98.9) |
42.27 | 0.47 | |
| PCR | non-P. falciparum | 76.1 (66.3-83.8) |
99.2 (97.0-99.8) |
97.1 (90.0-99.2) |
92 (88.1-94.7) |
92.51 | 0.24 |
| P. falciparum | 81.8 (52.3-94.9) |
99.1 (97.3-99.7) |
75 (46.8-91.1) |
99.4 (97.7-99.8) |
87.27 | 0.18 | |
a.- Confidence interval at 95%.
b.- Positive predictive value.
c.- Negative predictive value.