Statistical analysis
Pearson’s chi-squared test was used to analyze the students’ opinions about the teaching methods among the three groups. Scores for the theory test and case analysis were expressed as mean value ± standard deviation (SD). The Shapiro Wilk test was used to determine whether the data are normal distribution. The Kruskal-Wallis H was applied to analyze the difference in scores among the three groups. The Kruskal-Wallis test was used for subsequent pairwise comparison between different groups. All tests were two-sided, with 