Obesity and Overweight Are Independently Associated with Greater Survival in Critically Ill Diabetic Patients: A Retrospective Cohort Study

Table 3

HRs (95%CIs) of 30-day and 90-day mortality according to BMI category.

	Unadjusted		Model-1^†		Model-2^‡
	HR (95% CI)	value	HR (95% CI)	value	HR (95% CI)	value
30-day mortality
Normal weight	1.00		1.00		1.00
Overweight	0.64 (0.53, 0.78)	<0.001	0.69 (0.57, 0.83)	<0.001	0.76 (0.62, 0.92)	0.006
Obesity	0.52 (0.43, 0.63)	<0.001	0.63 (0.53, 0.77)	<0.001	0.62 (0.51, 0.75)	<0.001
90-day mortality
Normal weight	1.00		1.00		1.00
Overweight	0.67 (0.57, 0.79)	<0.001	0.72 (0.61, 0.84)	<0.001	0.79 (0.67, 0.93)	0.005
Obesity	0.50 (0.43, 0.58)	<0.001	0.62 (0.53, 0.72)	<0.001	0.60 (0.51, 0.70)	<0.001

Abbreviations: HR: hazard ratio; CI: confidence interval; BMI: body mass index. Normal weight category acts as the reference group. ^†Model-1 was adjusted for the confounders age, gender, and ethnicity. ^‡Model-2 was adjusted for the confounders age, gender, ethnicity, admission type, ICU type, DM, SOFA, APS III, AMI, stroke, renal failure, respiratory failure, heart failure, and malignancy. In 30-day mortality model, SOFA, APS III, renal failure, heart failure, and malignancy were entered as time-dependent covariates. In 90-day mortality model, SOFA, APS III, renal failure, respiratory failure, heart failure, and malignancy were entered as time-dependent covariates.