Clinical features, laboratory characteristics and risk factors for mortality of COVID-19 patients in a secondary hospital in Oman during the first wave of the SARS-CoV-2 pandemic

Bulletin of the National Research Centre

Table 4 Areas under the ROC (AUC) for a number of laboratory parameters

Test Result Variable(s)	Missing	Area	Std. Error	Asymptotic Sig	Asymptotic 95% Confidence Interval
Test Result Variable(s)	Missing	Area	Std. Error	Asymptotic Sig	Lower Bound	Upper Bound
WBC	3	0.611	0.032	< 0.001	0.549	0.674
Platelet	3	0.463	0.032	0.245	0.400	0.527
Neutrophils	3	0.631	0.032	< 0.001	0.569	0.693
Lymphocytes	3	0.413	0.033	0.006	0.349	0.477
Eosinophils	3	0.421	0.030	0.012	0.362	0.479
Basophils	5	0.496	0.032	0.907	0.433	0.559
Hemoglobin	3	0.454	0.033	0.140	0.390	0.517
C- reactive protein	36	0.638	0.030	< 0.001	0.579	0.697
Urea	19	0.841	0.023	< 0.001	0.796	0.887
Sodium	19	0.573	0.037	0.022	0.500	0.646
Creatinine	19	0.639	0.031	< 0.001	0.579	0.700
eGFR	38	0.213	0.028	< 0.001	0.158	0.267
Troponin	135	0.742	0.031	< 0.001	0.682	0.803
LDH	104	0.817	0.026	< 0.001	0.766	0.868
Ferritin	110	0.615	0.033	0.001	0.551	0.678
Glucose	236	0.612	0.040	0.008	0.535	0.690
d-dimer	366	0.728	0.057	0.004	0.616	0.841
Lactate	403	0.625	0.080	0.122	0.469	0.782
INR	282	0.637	0.045	0.003	0.550	0.725
Corrected calcium	313	0.503	0.050	0.950	0.405	0.601
ALT	39	0.636	0.032	< 0.001	0.574	0.698
Total bilirubin	39	0.557	0.034	0.077	0.490	0.624
Albumin	38	0.212	0.024	< 0.001	0.164	0.259
NLR	3	0.665	0.031	< 0.001	0.605	0.725
PLR	3	0.562	0.034	0.050	0.495	0.628
LCR	36	0.654	0.031	< 0.001	0.593	0.715

	Area	Asymptotic Sig	Asymptotic 95% confidence interval		Sensitivity	1-Specificity	Cut-off value
	Area	Asymptotic Sig	Lower Bound	Upper Bound	Sensitivity	1-Specificity	Cut-off value
Urea	0.841	< .001	0.796	0.887	0.777	0.192	9.015
Troponin	0.742	< .001	0.682	0.803	0.713	0.314	21.15
LDH	0.817	< .001	0.766	0.868	0.781	0.273	514.25