Table 4 The slide positivity rate and accuracy of routine malaria microscopy compared to expert microscopy, stratified by age categories
From: Malaria misdiagnosis in Uganda – implications for policy change
Patients <5 years n/N,% (95% CI) | Patients ≥5 years n/N,% (95% CI) | All patients n/N,% (95% CI) | |
|---|---|---|---|
Slide positivity rate (routine microscopy) | 20/48, 41.7 (25.7–57.5) | 58/110, 52.7 (38.8–66.7) | 78/158, 49.4 (36.7–62.1) |
Slide positivity rate (expert microscopy) | 17/48, 35.4 (21.2–49.6) | 12/110, 10.9 (4.8–17.0) | 29/158, 18.4 (12.5–24.2) |
Sensitivity | 9/17, 52.9 (24.2–81.7) | 8/12, 66.7 (35.6–97.7) | 17/29, 58.6 (38.4–78.9) |
Specificity | 20/31, 64.5 (44.7–84.3) | 48/98, 49.0 (34.6–63.3) | 68/129, 52.7 (39.2–66.2) |
PPV | 9/20, 45.0 (18.3–71.7) | 8/58, 13.8 (4.7–22.9) | 17/78, 21.8 (11.0–32.6) |
NPV | 20/28, 71.4 (53.5–89.3) | 48/52, 92.3 (84.8–99.8) | 68/80, 85.0 (78.9–91.1) |