Test characteristics of tachypnea for detecting pneumonia in children with acute respiratory infection*
| Test | Patient group | Sensitivity (95% CI) | Specificity (CI) | +LR | −LR |
|---|---|---|---|---|---|
| *Abbreviations defined in glossary; LRs calculated from data in article. | |||||
| Tachypnea | All children | 74% (60 to 88) | 67% (56 to 77) | 2.2 | 0.4 |
| Disease duration <3 days | 55% (40 to 72) | 64% (49 to 80) | 1.5 | 0.7 | |
| Disease duration 3 to 5 days | 64% (49 to 78) | 66% (51 to 80) | 1.9 | 0.5 | |
| Disease duration ≥6 days | 93% (84 to 102) | 73% (57 to 89) | 3.4 | 0.1 | |
| Clinical judgment | All children | 74% (61 to 88) | 56% (48 to 69) | 1.7 | 0.5 |