Demographic data of the trainees
Among the 160 trainees, 147 were enrolled in this study (excluding 13 trainees who were ineligible) and none of them were lost to follow-up. In the final analyses, 45 trainees in 2018, 48 in 2019, and 54 in 2020 were included. Descriptive statistics revealed no significant differences in gender and age among the three groups and the three groups across different years (all P > 0.05). At baseline, no significant differences were found for educational background variables for basic courses of TCM and Western medicine among the three groups and the three groups across different years (all P > 0.05). Table 
Demographic data of the trainees among the three groups from 2018–2020 (n = 147)