Table 3.
Measures of malaria microscopy performance in surveyed health facilities in malaria low-transmission areas of Kenya, 2014
| Quality-assurance pilot programme | Number of slides | Sensitivity | Specificity | Positive predictive value | Negative predictive value | Kappa value | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| % | 95% CI | % | 95% CI | % | 95% CI | % | 95% CI | ĸ | 95% CI | ||
| Overall | |||||||||||
| Yes | 378 | 96 | (90–99) | 92 | (88–95) | 76 | (67–84) | 99 | (97–99) | 0.80 | (0.74–0.88) |
| No | 378 | 62 | (49–74) | 80 | (76–85) | 40 | (31–50) | 91 | (87–94) | 0.35 | (0.24–0.46) |
| Dispensary | |||||||||||
| Yes | 36 | 100 | (59–100) | 100 | (88–100) | 100 | (59–100) | 100 | (88–100) | 1.00 | – |
| No | 36 | 62 | (24–91) | 54 | (34–72) | 28 | (10–53) | 83 | (59–96) | 0.11 | (−0.16 to 0.38) |
| Health centre | |||||||||||
| Yes | 180 | 88 | (69–97) | 90 | (85–94) | 60 | (42–75) | 98 | (94–100) | 0.65 | (0.51–0.79) |
| No | 180 | 59 | (39–76) | 94 | (89–97) | 65 | (44–84) | 92 | (87–96) | 0.55 | (0.38–0.72) |
| Primary hospital | |||||||||||
| Yes | 144 | 100 | (92–100) | 93 | (85–97) | 87 | (75–95) | 100 | (96–100) | 0.89 | (0.82–0.97) |
| No | 144 | 62 | (41–80) | 69 | (59–77) | 30 | (18–44) | 89 | (81–95) | 0.22 | (0.06–0.37) |
| Secondary hospital | |||||||||||
| Yes | 18 | 100 | (40–100) | 93 | (66–100) | 80 | (28–99) | 100 | (75–100) | 0.85 | (0.58–1.00) |
| No | 18 | 100 | (29–100) | 87 | (60–98) | 60 | (15–95) | 100 | (75–100) | 0.68 | (0.29–1.00) |
Italic denotes statistical significance
CI Confidence interval