Table 2.
Study outcomes
| Variable | All (n = 381 855) | Underweight (< 18.4 kg/m2) (n = 10 986) | Ideal body weight (18.5–24.9 kg/m2) (n = 112 064) | Overweight (25.0–29.9 kg/m2) (n = 125 194) | Class I obesity (30.0–34.9 kg/m2) (n = 73 028) | Class II and above (> 35 kg/m2) (n = 60 583) | P |
|---|---|---|---|---|---|---|---|
| Primary outcome | |||||||
| Hospital mortality | 24 999 (6.6%) |
1304 (11.9%) |
8604 (7.7%) |
7949 (6.4%) |
3937 (5.4%) |
3205 (5.3%) |
< 0.001 |
| Secondary outcomes | |||||||
| ICU | 15 956 | 719 | 5294 | 5195 | 2593 | 2155 | < 0.001 |
| mortality | (4.2%) | (6.6%) | (4.7%) | (4.2%) | (3.6%) | (3.6%) | |
| ICU LOS (days), median (IQR) | 1.7 (0.9–3.2) | 1.9 (0.9–3.7) | 1.8 (0.9–3.4) | 1.8 (0.9–3.1) | 1.7 (0.9–3.1) | 1.5 (0.9–3.0) | < 0.001 |
| Hospital LOS (days), median (IQR) | 8.3 (4.9–14.9) | 9.7 (5.1–18.6) | 8.7 (5.0–15.9) | 8.4 (5.2–14.8) | 8.2 (5.0–14.2) | 7.4 (4.0–13.7) | < 0.001 |
ICU = intensive care unit; IQR = interquartile range; LOS = length of stay.