Table 4.

COVID-19 risk scores and corresponding AUROCs

		Model 1	Model 2	Model 3
Sick contact with suspected or confirmed COVID-19 case		+10 points	+2 points	+3 points
Nursing Facility Residence		+10 points	+2 points	+3 points
Obesity		+3 points	+1 point	+1 point
Constitutional symptom (fever, chills, or myalgia)		+2 points	+1 point	+1 point
Respiratory symptom (cough or shortness of breath)		+4 points	+1 point	+1 point
Gastrointestinal symptom (nausea, vomiting, or diarrhoea)		+4 points	+1 point	+1 point
Hypoxia on triage		+4 points	+1 point	+1 point
Leucocytosis		−3 points	−1 point	−1 point
Total points		37 points	9 points	11 points
AUROC (95% CI)	Development cohort	0.87 (0.83–0.92)	0.87 (0.83–0.92)	0.87 (0.82–0.92)
	Validation cohort	0.85 (0.78–0.92)	0.83 (0.76–0.90)	0.85 (0.78–0.92)