Table 2. Cox proportional risk regression models for prediction of severe COVID-19 using clinical characteristics at triage evaluation.

Model	Parameter	β	HR (95%CI)	p-value
c-statistic = 0.694 (95% CI 0.668–0.721)	MSL-COVID-19	0.108	1.114 (1.088–1.140)	<0.001
c-statistic = 0.790 (95%CI 0.767–0.813)	Age	0.024	1.024 (1.018–1.031)	<0.001
	SpO2 (%)	-0.028	0.972 (0.9670.977)	<0.001
	Respiratory rate	0.022	1.022 (1.012–1.033)	<0.001
c-statistic = 0.791 (95%CI 0.768–0.813)	MSL-COVID-19	0.081	1.085 (1.059–1.111)	<0.001
	SpO2 (%)	-0.026	0.975 (0.969–0.980)	<0.001
	Respiratory rate	0.018	1.019 (1.008–1.029)	<0.001