Sensitivity, specificity, and predictive values of a respiratory rate (RR) ⩾ 40/min, ⩾ 50/min, ⩾ 60/min, ⩾ 70/min, and ⩾ 80/min for hypoxia in 200 acutely ill infants
| RR (breaths/min) | Hypoxia | Sensitivity (%) | Specificity (%) | Predictive value (%) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Present (n = 77) | Absent (n = 13) | Positive | Negative | ||||||
| ⩾ 40 (n = 152) | 74 | 78 | 96 | 37 | 49 | 94 | |||
| ⩾ 50 (n = 120) | 70 | 501-150 | 91 | 59 | 58 | 91 | |||
| ⩾ 60 (n = 101) | 62 | 391-150 | 80.5 | 68 | 61 | 85 | |||
| ⩾ 70 (n = 58) | 39 | 191-150 | 51 | 85 | 67 | 73 | |||
| ⩾ 80 (n = 25) | 17 | 8 | 22 | 99 | 68 | 66 | |||
↵1-150 p < 0.001.