Table 3.

Cox proportional hazard regression analysis for ICU all-cause mortality

Group	Non-adjusted model		Adjusted model
	HR (95% CI)	p value	HR (95% CI)	p value
MIMIC IV database
Normal ACAG	1		1
High ACAG	2.474 (1.504–4.069)	< 0.001	2.852 (1.718–4.734)	< 0.001
Huzhou central hospital
Normal ACAG	1		1
High ACAG	2.288 (1.416–3.696)	0.001	2.637 (1.584–4.389)	< 0.001

The adjusted model of MIMIC IV database adjusted for SOFA score, hemoglobin, red cell distribution width, platelet, serum creatinine, blood urea nitrogen, magnesium, diabetes, atrial fibrillation, cerebral infarction and cardiac arrest

The adjusted model of Huzhou Central Hospital adjusted for SOFA score, white blood cell, hemoglobin, red cell distribution width, serum creatinine, acute respiratory failure and cardiac arrest

ACAG albumin corrected anion gap, ICU intensive care unit