Table 4.

Threshold Effect Analysis of the Relationship Between the Serum AG and Death Using a Two-Piecewise Regression Model

Serum AG Inflection Point	HR (95% CIs)	p-value
<13.8	0.82 (0.61, 1.09)	0.1719
≥13.8	1.15 (1.08, 1.23)	<0.0001
P for log likelihood ratio test		0.046

Note: Adjusted for age, sex, alcohol abuse, congestive heart failure, diabetes mellitus, hypertension, eGFR, albumin, and the SOFA score.

Abbreviations: AG, anion gap; CI, confidence interval; eGFR, estimated glomerular filtration rate; HR, hazard ratio; SOFA, sequential organ failure assessment.