Table 7.

Multiple linear regression analysis of length of stay.

Variables	Unstandardized coefficients		Standardized coefficients B	t	Significance	B (95.0%CI)		VIF
	Unstandardized coefficients B	SD				Lower limits	Upper limits
Constant	9.970	0.503		19.826	P < 0.001	37.740	53.043
Age	0.030	0.004	0.108	7.103	P < 0.001	0.176	0.306	1.166
Out-of-pocket ratio of costs	−4.533	0.883	−0.074	−5.135	P < 0.001	−39.377	−12.287	1.037
Type of diseases(ref: tumors)
Mental and behavioral disorders	3.827	0.993	0.059	3.852	P < 0.001	22.505	55.997	1.170
Neurological diseases	5.407	0.454	0.288	11.920	P < 0.001	29.371	43.195	2.943
Circulatory system diseases	4.240	0.367	0.385	11.541	P < 0.001	19.246	30.358	5.595
Diseases of the skeletal muscle system and connective tissue	4.035	0.634	0.188	6.361	P < 0.001	15.037	35.118	4.401
Injury, poisoning, and certain other results of exogenous effects	4.923	0.529	0.180	9.305	P < 0.001	21.661	37.636	1.888
Factors affecting health status and exposure to health services	3.166	0.484	0.132	6.542	P < 0.001	10.059	24.713	2.058
Other diseases	6.038	0.461	0.283	13.103	P < 0.001	36.220	50.360	2.349
Nature of the hospital(ref: public hospital)
Private school	−2.478	0.265	−0.184	−9.366	P < 0.001	−25.192	−17.072	1.952
Grade of the hospital(ref: primary school)
Secondary school	−8.285	0.508	−0.451	−16.317	P < 0.001	−67.829	−51.321	3.848
Tertiary hospital	2.408	0.182	0.199	13.223	P < 0.001	13.435	18.957	1.142