Table 7.

Univariate Cox proportional hazards regression analysis (P = 0.001 for trend)

Variable	Multivariate OR (95%CI)	P-value
RDW-CV	1.615 (1.258-2.072)	0.000
RDW-SD	1.166 (1.077-1.261)	0.000
RDW-CV and RDW-SD	1.005 (1.003-1.008)	0.000
APACHE II	1.151 (1.048-1.264)	0.003
SOFA	1.363 (1.175-1.582)	0.000

RDW-CV: Coefficient of variation of red blood cell distribution width; RDW-SD: Standard deviation of red blood cell distribution width; APACHE II: Acute Physiology and Chronic Health Evaluation II score; SOFA: Sequential Organ Failure Assessment score; AUC: Area under the curve; OR: Odds ratio CI: Confidence interval.