Table 2. Multiple regression analysis of the total hospitalization costs.

Variables	Reference	Coefficient	Standard error	t	P
Age		0.059	0.002	28.72	<0.001
Gender
Male	Female	0.013	0.003	4.74	<0.001
Length of hospital stay		0.747	0.004	204.36	<0.001
Region
Other provinces	Shanghai	−0.014	0.003	−4.07	<0.001
Season
Spring	Winter	−0.018	0.004	−4.77	<0.001
Summer		0.016	0.004	4.13	<0.001
Autumn		0.045	0.004	12.63	<0.001
Severity
Severe	Non-severe	0.196	0.003	60.32	<0.001
Medical payment method
Commercial health insurance	Social medical insurance	−0.013	0.004	−3.71	<0.001
Self-paying		0.007	0.003	2.22	0.03
Discharge conditions
Cured or improved	Against-advice discharge	0.094	0.019	5.04	<0.001
		0.072	0.022	3.26	0.001
Hospital level
Tertiary hospital	Secondary hospital	0.327	0.003	104.01	<0.001
Specialized hospital		1.316	0.006	236.68	<0.001