Table 3.

Cross-tabulation of body mass index and outcomes

Outcome	Low,  ≤ 18.5 kg/m2	Medium–low, 18.6–21.0 kg/m2	Medium–high, 21.1–23.7 kg/m2	High,  ≥ 23.8 kg/m2	P value
In-hospital mortality	146 (14.8%)	77 (7.8%)	68 (6.9%)	59 (6.0%)	< 0.001
Length of stay	23.8 (22.0)	21.0 (19.5)	17.9 (17.0)	17.5 (16.0)	< 0.001

Binary and continuous measures are presented as n (%) and mean (standard deviation), respectively, and were tested using the chi-square test and analysis of variance, respectively. The length of stay was calculated for patients in whom in-hospital death did not occur