Table 4.
The outcomes based on body mass index categories in multivariable regression analyses
| Type of outcome | In-hospital mortality | Length of stay | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Body mass index | Odds ratio | 95% Confidence interval | P value | Difference | 95% Confidence interval | P value | ||||
| Low, ≤ 18.5 kg/m2 | 1.74 | 1.25 | - | 2.41 | 0.001 | 4.43 | 2.71 | - | 6.15 | < 0.001 |
| Medium–low, 18.6–21.0 kg/m2 | 0.87 | 0.60 | - | 1.24 | 0.43 | 2.01 | 0.34 | - | 3.68 | 0.018 |
| Medium–high, 21.1–23.7 kg/m2 | Reference | Reference | ||||||||
| High, ≥ 23.8 kg/m2 | 0.86 | 0.58 | - | 1.25 | 0.43 | -0.27 | -1.93 | - | 1.38 | 0.75 |
The length of stay was calculated for patients in whom in-hospital death did not occur