Statistical analysis
The quantitative data of cephalometric measurements were analyzed by the statistical software
As for questionnaire data, we obtained the statistical data through the built-in function on the online questionnaire platform, as it provided the constituent ratio of each option and participants list. Then we performed a descriptive analysis of these results.
Before the course, the standard of anatomical markers on lateral cranial radiographs were calibrated. Firstly, two orthodontists reviewed the basic definitions and meanings of common anatomical points and items. Then, they measured a lateral cranial radiograph on paper and by software, followed by discussing and unifying the anatomical position standard. Subsequently, they respectively completed cephalometric measurement of another lateral cranial radiograph. The intraclass correlation coefficient (ICC) was greater than 90%, showing consistency of cephalometric measurement between them.