Table 2.

Multivariate Models, Showing Assignment of Points Based on the Beta-Coefficients

Variable	β-Coefficient	P > z	β/Lowest β	Points
Model A: Base score, AUROCC = 0.847
Dyspnea	1.3740	0.000	1.50	1.5
Any comorbidity *	1.1146	0.000	1.22	1
Age 50 to 59 years	0.9165	0.000	1.00	1
Age 60 to 69 years	1.4885	0.000	1.62	1.5
Age 70 + years	2.1250	0.000	2.32	2.5
Constant	−5.0277
Model B: Adds fever, AUROCC = 0.850
Dyspnea	1.3807	0.0000	1.77	2
Any comorbidity *	1.1059	0.0000	1.42	1.5
Age 50 to 59 years	0.9013	0.0000	1.16	1
Age 60 to 69 years	1.4902	0.0000	1.91	2
Age 70 + years	2.1290	0.0000	2.73	3
Temperature ≥ 100.4	0.7798	0.0020	1.00	1
Constant	−5.0753
Model C: Adds respiratory rate > 20/min, AUROCC = 0.853
Respiratory rate > 20/min	0.8615	0.000	1.11	1
Dyspnea	1.3167	0.000	1.69	1.5
Any comorbidity *	1.0753	0.000	1.38	1.5
Age 50 to 59 years	0.8967	0.000	1.15	1
Age 60 to 69 years	1.4709	0.000	1.89	2
Age 70 + years	2.1074	0.000	2.71	3
Temperature ≥ 100.4	0.7784	0.002	1.00	1
Constant	−5.0856
Model D: Adds oxygen saturation ≤ 95%, AUROCC = 0.872
Oxygen saturation ≤ 95%	1.4937	0.000	2.37	2.5
Dyspnea	1.2769	0.000	2.03	2
Any comorbidity *	1.0810	0.000	1.72	1.5
Age 50 to 59 years	0.7538	0.001	1.20	1
Age 60 to 69 years	1.1124	0.000	1.77	2
Age 70 + years	1.6574	0.000	2.63	2.5
Temperature ≥ 100.4	0.6295	0.018	1.00	1
Constant	−5.1852

↵Notes: *Type 1 or 2 diabetes mellitus, asthma, COPD or chronic bronchitis, hypertension, cardiovascular disease, chronic kidney disease, chronic liver disease, or cancer.
Abbreviation: AUROCC, The area under the ROC curve.