Table 3. Results of univariate feature selection in the training cohort using the novel metric p_DeLong.

	AUC	pDeLong	OR	p-value
Age	0.74	<0.001	-	-
Sex	0.54	0.317	1.44	<0.001
Smoking History	0.56	0.022	-	-
Healthcare worker	0.53	0.555	0.16	<0.001
Alcohol use disorder	0.51	0.926	1.40	0.164
Pregnancy	0.50	0.947	0.00	0.076
Hypertension	0.57	0.010	1.75	<0.001
Diabetes	0.57	0.012	1.93	<0.001
Rheumatic diseases	0.52	0.805	1.47	0.009
Autoimmune disorder	0.50	0.970	0.90	0.659
Dementia	0.54	0.234	4.41	<0.001
Cancer	0.52	0.745	1.80	0.001
COPD	0.53	0.616	1.45	0.002
Asthma	0.51	0.893	0.73	0.073
CHD	0.50	0.949	1.12	0.612
CCD	0.59	<0.001	2.18	<0.001
CND	0.55	0.160	2.05	<0.001
CLD	0.51	0.904	1.48	0.068
CKD	0.54	0.227	2.11	<0.001
AIDS	0.50	0.946	0.00	0.131
Cachexia	0.50	0.958	0.69	0.54
Organ transplant	0.50	0.957	0.69	0.54

Selected features are in bold. COPD, chronic obstructive pulmonary disease; CHD, chronic hematologic disease; CCD, chronic cardiac disease; CND, chronic neurological disease; CLD, chronic liver disease; CKD, chronic kidney disease; AIDS, Acquired Immune Deficiency Syndrome; AUC, area under the Receiver Operating Characteristic curve; OR, odds ratio.