Table 4.

Factors associated with the physician comprehensive workload (N = 1,934; df = 1,886).

Independent variables	β	SE	t-test	p-value	VIF
Constant	6.353	0.103	61.67	<0.001
Gender (ref: Male)
Female	0.115	0.0336	3.41	0.001	1.38
Area (ref: Central China)
Eastern China	0.104	0.0356	2.92	0.004	1.60
Western China	0.134	0.0400	3.36	0.001	1.53
Working hours per week (ref: >60)
≤40	−0.156	0.601	−2.59	0.010	1.36
41–60	−0.0817	0.0313	−2.61	0.009	1.30
Outpatient working hours per week (ref: ≤8)
~16	0.0372	0.0383	0.97	0.331	1.42
~24	0.123	0.0415	2.97	0.003	1.50
~40	0.129	0.0505	2.56	0.010	1.48
>40	0.250	0.0513	4.89	<0.001	1.38

SE, standard error; VIF, variance inflation factor (mean VIF = 1.87, ranging from 1.15–4.78).