Table 4.

Mixed linear model of factors associated with ADR.

Parameters	β	95% CI	P
Intercept	0.04214	0.02254-0.06173	<0.001
Tertiary hospital	0.08368	0.06261-0.10476	<0.001
Secondary hospital	0.07585	0.05740-0.09430	<0.001
Ungraded hospital	0.03179	0.00584-0.05774	0.016
Number of endoscopists	0.00015	-0.00087-0.00127	0.794
Percentage of endoscopists with master’s and doctoral degrees (per 10%)	0.00412	0.00185-0.00638	<0.001
GDP per capita (per 10,000 RMB)	0.00125	0.00028-0.00222	0.011
Incidence of CRC (per 1/100,000)	0.00009	-0.00016-0.00035	0.469
Volume of colonoscopy (per 100 cases)	0.00023	0.00036-0.00043	0.021

The parameters of primary hospitals are redundant in the mixed linear model.