Table 1.

Description of variables in the logistic model of PSM

Variable name	Description
Dependent variable
Group	intervention group (1); control group (0)
Independent variable
Gender	male (1); female (0)
Age (year)	continuous
Experience (year)	continuous
Education level	high school or less (1); some college or associates (2); bachelors or higher (3)
Title	not certified (1); certified doctor (2); house physician (3); doctor in charge of a case (4); assistant director physician and above (5)
Monthly income (yuan)	<1500 (1); 1501–2000 (2); 2001–2500 (3); 2501–3000 (4); >3001 (5)