Statistics and ethical issues
With our quantitative analysis, we tested the hypothesis that there are differences between cPbL and bPbL groups in evaluation, exam or lecture attendance to imply non-inferiority if the initial hypothesis were to be rejected. For comparison of exam results and evaluation items, a Mann–Whitney test was applied. Proportion of lecture attendance or use of videos was compared by 2 × 2 contingency tables and Fisher’s exact test. Throughout, 