Predictive accuracy of 4C Mortality Score and Acute Physiology and Chronic Health Evaluation scores for mortality in COVID-19 patients admitted to intensive care unit

Table 6 Optimal cut-off value for the four predictive scores

	Cut-off value	Sensitivity	Specificity	AUROC	95%CI for cut-off value
Hospital 4C mortality	9	0.74	0.72	0.73	7.2-10.8
ICU 4C mortality	10	0.84	0.72	0.78	8.9-11.1
APACHE II	14	0.68	0.67	0.68	11.8-16.2
APACHE III	56	0.79	0.73	0.76	52.0-60.0

APACHE: Acute Physiology and Chronic Health Evaluation; AUROC: Area under receiver operating characteristic curve; CI: Confidence interval.