Test characteristics for detecting hypoxia in infants with acute illnesses*

Respiratory rateSensitivity (95% CI)Specificity (CI)+LR−LR
*Abbreviations defined in glossary; CIs and LRs calculated from data in article.
≥40 breaths/minute96% (89 to 99)37% (28 to 46)1.50.1
≥50 breaths/minute91% (82 to 96)59% (50 to 68)2.20.2
≥60 breaths/minute81% (70 to 89)68% (59 to 76)2.50.3
≥70 breaths/minute51% (39 to 62)85% (77 to 90)3.30.6
≥80 breaths/minute22% (13 to 33)93% (88 to 97)3.40.8