Table 4.

Cox regression analysis with respect to obesity category.

	28–Day Mortality			90–Day Mortality
Variable	Hazard Ratio	95% Cl	p Value	Hazard Ratio	95% Cl	p Value
• Age	1.025	1.008–1.043	0.0039	1.024	1.009–1.039	0.0013
• SOFA score at baseline	1.016	0.948–1.089	0.6556	1.009	0.953–1.069	0.755
• APACHE II score	1.008	0.967–1.051	0.7033	1.004	0.97–1.04	0.822
• Male gender	1.01	0.661–1.542	0.9639	0.93	0.656–1.318	0.6833
• Hypertension	0.993	0.651–1.515	0.9737	1.107	0.773–1.583	0.5803
• Dialysis at baseline	0.603	0.333–1.09	0.0937	0.611	0.37–1.007	0.0534
• Dialysis during observation	2.798	1.727–4.533	0.0001	2.769	1.841–4.165	0.0001
• Obesity (BMI ≥ 30 kg/m2)	0.462	0.264–0.808	0.0068	0.57	0.371–0.874	0.01