Table 4. Multivariable and univariate linear regression model comparing severe disease status in the total population.

Disease severity score/total population	Variable*	Coef.	t statistics	CI	P>|t| (Multivariable models)	P>|t| (Univariable model)
	During the peak	0.01	4.36	0.006, 0.02	<0.001	<0.001
	After the peak	0.01	3.00	0.004, 0.02	0.003	<0.001
Total population	Age	0.0007	15.96	0.0006, 0.0008	<0.001	<0.001
	Underlying diseases	0.02	9.68	0.01, 0.02	<0.001	<0.001
	Cough	-0.005	-3.54	-0.009, - 0.003	<0.001	<0.001

*"Before the peak" is the reference category.