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.