Table 3. Sensitivity, specificity, positive and negative predictive value of predictors of hypoxemia in the severely malnourished children with pneumonia.
| Variable | Hypoxemic (n = 37) | Non-hypoxemic (n = 111) | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) |
| Fast breathing | 31 (84) | 52 (47) | 84 (67–93) | 53 (43–63) | 37 (27–49) | 91 (80–96) |
| Lower chest wall in-drawing | 33 (89) | 44 (40) | 89 (74–96) | 60 (51–69) | 43 (32–55) | 94 (84–98) |
| Convulsion at admission | 7 (19) | 2 (2) | 19 (9–36) | 98 (93–100) | 78 (40–96) | 78 (70–85) |
| Nasal flaring | 2 (5) | 1 (1) | 5 (1–20) | 99 (94–100) | 67 (13–98) | 76 (68–82) |
| Head nodding | 2 (5) | 1 (1) | 5 (1–20) | 99 (94–100) | 67 (13–98) | 76 (68–82) |
| Crackles in lungs | 31 (84) | 74 (67) | 84 (67–93) | 33 (25–43) | 30 (21–39) | 86 (71–94) |
| Inability to drink | 5 (14) | 10 (10) | 14 (5–30) | 90 (83–95) | 31 (12–56) | 76 (67–83) |
Figures represent n (%) unless indicated otherwise.
PPV = Positive predictive value; NPV = Negative predictive value.