Table 2.
Median, 25–75 percentiles, mean, mean difference test results, and Hodges Lehman median estimation and 95% confidence intervals of defined time periods in patients with normal BMI and morbidly obese
| Time (seconds) | Normal BMI (18 < BMI < 25 kg/m2) (n = 51) |
Morbidly obese (BMI > 40 kg/m2) (n = 51) | Difference 95%CI | P values | Hodges Lehman Median difference | Hodges Lehman Median difference %95 CI |
|---|---|---|---|---|---|---|
| Tolerable apnea time Mean, Median 25–75 percentiles | 383 (364.61) 286–469 | 194 (195.43) 135–236 | 169.18 (126.83; 211.52) | 0.000* | -173 | (-218; -129) |
| ORiⓇ warning time Mean, Median 25–75 percentiles | 94 (97.25) 55–116 | 32 (38.80) 24–45 | 58.45 (41.20; 75.70) | 0.000** | -51 | (-67; -34) |
| SpO2 warning time Mean, Median 25–75 percentiles | 36 (49.53) 18–59 | 15 (27.06) 13–32 | 22.47 (6.54; 38.41) | 0.007** | -11 | (-22; -3) |
| Added warning time Mean, Median 25–75 percentiles | 38 (54.08) 29–68 | 17 (21.82) 11–28 | 32.26 (18.01; 46.51) | 0.000** | -24 | (-33; -17) |
*ttest **Mann-Whitney Test
BMI; body mass index, ORiⓇ; oxygen reserve index, SpO2;percutaneous oxygen saturation