Test characteristics for detecting hypoxia in infants with acute illnesses*
| Respiratory rate | Sensitivity (95% CI) | Specificity (CI) | +LR | −LR |
|---|---|---|---|---|
| *Abbreviations defined in glossary; CIs and LRs calculated from data in article. | ||||
| ≥40 breaths/minute | 96% (89 to 99) | 37% (28 to 46) | 1.5 | 0.1 |
| ≥50 breaths/minute | 91% (82 to 96) | 59% (50 to 68) | 2.2 | 0.2 |
| ≥60 breaths/minute | 81% (70 to 89) | 68% (59 to 76) | 2.5 | 0.3 |
| ≥70 breaths/minute | 51% (39 to 62) | 85% (77 to 90) | 3.3 | 0.6 |
| ≥80 breaths/minute | 22% (13 to 33) | 93% (88 to 97) | 3.4 | 0.8 |