Table 3.

Comparisons of outcomes between obese and non-obese patients after propensity score matching

	Laparotomy (+) (N = 5796)
	Obese patients (N = 2898)	Non-obese patients (N = 2898)	SD*
Hospital LOS (day)	11.1 (10.6–11.6)	9.6 (9.3–9.9)	0.135
ICU LOS (day)	3.5 (3.2–3.8)	2.3 (2.1–2.5)	0.171
Mortality (%)	3.7 (3.0–4.4)	2.4 (1.8–3.0)	0.241

	Laparotomy (−) (N = 10,678)
	Obese patients (N = 5339)	Non-obese patients (N = 5339)	SD
Hospital LOS (day)	4.9 (4.7–5.0)	4.7 (4.5–4.8)	0.031
ICU LOS (day)	0.8 (0.7–0.8)	0.7 (0.7–0.8)	0.003
Mortality (%)	1.0 (0.7–1.3)	1.1 (0.8–1.4)	0.068

Both patients who received laparotomies or not are revealed

Numerical data: mean (95% CI: lower–upper)

Nominal data: percentage (95% CI: lower–upper)

*SD = standardized difference (SD ≥ 0.1 represent significant differences in covariables between groups)

LOS length of stay, ICU intensive care unit