Table 5.
Sensitivity and specificity of hospital malaria diagnosis based on expert microscopy
| Expert Microscopy results as standard reference | Hospital laboratory Microscopic inspection of blood smear | Rapid diagnostic test | Presumptive diagnosis | |||
|---|---|---|---|---|---|---|
| Positive | Negative | Positive | Negative | Positive | Negative | |
| Positive | 49 | 54 | 45 | 16 | 9 | 26 |
| Negative | 23 | 150 | 7 | 58 | 5 | 15 |
| Sensitivity % (95%CI) | 47.6 (38.2, 57.1) | 73.8 (60.7, 83.8) | 25.7 (13.1, 43.6) | |||
| Specificity % (95% CI) | 86.7 (80.8, 91.0) | 89.2 (78.5, 95.2) | 75.0 (50.6, 90.4) | |||
| Positive Predictive Value % (95% CI) | 68.1 (56.6, 77.7) | 86.5 (76.3, 94.0) | 64.3 (35.6, 86.0) | |||
| Negative Predictive Value % (95% CI) | 73.5 (67.1, 79.1) | 78.4 (67.0, 86.8) | 36.6 (22.6, 53.1) | |||
| Diagnostic Accuracy % (95% CI) | 72.1 (66.4, 77.3) | 81.7 (71.5, 90.9) | 43.6 (28.7, 58.5) | |||
| Agreement (Cohen's kappa) | 0.37 (0.25, 0.48) | 0.63 (0.50, 0.77) | 0.006 (0.00, 0.20) | |||