Body Mass Index Is Associated with the Severity and All-Cause Mortality of Acute Kidney Injury in Critically Ill Patients: An Analysis of a Large Critical Care Database

Table 2

Relationship between BMI and AKI stage III in different models.

Variable	Crude model		Model I		Model II
	OR (95 CIs)	value	OR (95 CIs)	value	OR (95 CIs)	value
BMI (kg/m^2)	1.02 (1.01, 1.02)	<0.0001	1.02 (1.02, 1.03)	<0.0001	1.02 (1.02, 1.03)	<0.0001
BMI (category) (kg/m^2)
<18.5	0.74 (0.60, 0.91)	0.0042	0.74 (0.60, 0.91)	0.0048	0.78 (0.59, 1.03)	0.0828
≥18.5, <25	1.0 (ref)		1.0 (ref)		1.0 (ref)
≥25, <30	1.14 (1.05, 1.24)	0.0017	1.14 (1.05, 1.24)	0.0013	1.17 (1.05, 1.30)	0.0055
≥30	1.26 (1.16, 1.37)	<0.0001	1.28 (1.18, 1.39)	<0.0001	1.32 (1.18, 1.47)	<0.0001

OR: odds ratio; CI: confidence interval. Models were derived from logistic multivariate regression models. The crude model was adjusted for none. The Adjust I model was adjusted for age, gender, and ethnicity. The Adjust II model was adjusted for age, gender, ethnicity, congestive heart failure, cardiac arrhythmias, valvular disease, hypertension, uncomplicated diabetes, complicated diabetes, renal failure, liver disease, metastatic cancer, coagulopathy, alcohol abuse, drug abuse, anion gap, bicarbonate, glucose, creatinine, chloride, hemoglobin, lactate, platelet, potassium, APTT, PT, sodium, BUN, WBC, heart rate, systolic blood pressure, respiratory rate, temperature, SPO₂, ICU length of stay, SAPSII, and SOFA.