Fig. 2From: Blended learning of radiology improves medical students’ performance, satisfaction, and engagementEvaluating performances: pretest vs. posttest comparison using Bland-Altman test. The average score was 73.0 for pretest and 77.7 for posttest. The absolute change was therefore an increase of 4.7 ± 17.5 points overall (P < 0.05). There is a correlation between the average value overall and the improvement between the pretest and posttest (Spearman’s rho = 0.39)Back to article page