Table 4.

The predictive performance of RAR on all-cause mortality.

Variables	Cut-off	Sensitivity	Specificity	PPV	NPV	AUC (95%CI)
90-day mortality
RDW	13.8	0.655	0.546	0.443	0.741	0.627 (0.597, 0.695)
Albumin	3.75	0.641	0.629	0.500	0.645	0.666 (0.636, 0.703)
RAR	3.9	0.585	0.697	0.516	0.753	0.674 (0.645, 0.703)
SOFA	3.5	0.639	0.672	0.518	0.771	0.699 (0.671, 0.728)
RAR + SOFA		0.758	0.603	0.513	0.819	0.730 (0.703, 0.757)
365-day mortality
RDW	13.6	0.704	0.492	0.507	0.691	0.626 (0.596, 0.655)
Albumin	5.35	0.002	0.999	0.500	0.574	0.652 (0.624, 0.681)
RAR	3.8	0.592	0.680	0.579	0.692	0.663 (0.634, 0.692)
SOFA	3.5	0.599	0.681	0.583	0.696	0.683 (0.656, 0.711)
RAR + SOFA		0.717	0.606	0.575	0742	0.714 (0.687, 0.740)

RAR, red blood cell distribution width to albumin ratio; RDW, red blood cell distribution width; SOFA, sequential organ failure assessment; PPV, positive predictive value; NPV, negative predictive value; AUC, area under the curve.