Table 13. Sensitivity, specificity, and predictive values for antigen tests.
| ICT | Og4C3 | ||||
| % (N) | 95% Confidence Interval | % (N) | 95% Confidence Interval | ||
| All Countries a | |||||
| Sensitivity | 75.5 (94) | (66.8, 84.2) | 87.2 (94) | (80.5, 94.0) | |
| Specificity | 92.5 (1647) | (91.2, 93.7) | 94.6 (1647) | (93.5, 95.7) | |
| Pos. Predictive Value | 36.4 (195) | (29.7, 43.2) | 48.0 (171) | (40.5, 55.4) | |
| Neg. Predictive Value | 98.5 (1546) | (97.9, 99.1) | 99.2 (1570) | (98.8, 99.7) | |
| French Polynesia | |||||
| Sensitivity | 79.3 (29) | (64.6, 94.1) | 93.1 (29) | (83.9, 100.0) | |
| Specificity | 92.3 (517) | (90.0, 94.6) | 98.6 (517) | (97.6, 99.6) | |
| Pos. Predictive Value | 36.5 (63) | (24.6, 48.4) | 79.4 (34) | (65.8, 93) | |
| Neg. Predictive Value | 98.8 (483) | (97.8, 99.8) | 99.6 (512) | (99.1, 100.0) | |
| Ghana | |||||
| Sensitivity | 61.1 (18) | (38.6, 83.6) | 72.2 (18) | (51.5, 92.9) | |
| Specificity | 94.3 (754) | (92.6, 96.0) | 91.6 (754) | (89.7, 93.6) | |
| Pos. Predictive Value | 20.4 (54) | (9.6, 31.1) | 17.1 (76) | (8.6, 25.6) | |
| Neg. Predictive Value | 99.0 (718) | (98.3, 99.7) | 99.3 (696) | (98.7, 99.9) | |
| Haiti | |||||
| Sensitivity | 78.7 (47) | (67.0, 90.4) | 89.4 (47) | (80.5, 98.2) | |
| Specificity | 89.1 (376) | (86.0, 92.3) | 94.9 (376) | (92.7, 97.2) | |
| Pos. Predictive Value | 47.4 (78) | (36.4, 58.5) | 68.9 (61) | (57.2, 80.5) | |
| Neg. Predictive Value | 97.1 (345) | (95.3, 98.9) | 98.6 (362) | (97.4, 99.8) | |
Definition of antigen test accuracy.
‘True Positive’: Blood Smear or PCR (+).
‘True Negative’: Blood Smear and PCR not (+); Bm14 and PanLF not (+).
a
Includes French Polynesia, Ghana and Haiti only; others excluded due to missing values for Bm14.