Fig. 3From: Friend or Foe? Flipped Classroom for Undergraduate Electrocardiogram Learning: a Randomized Controlled StudyDifferences in learning time out of class between flipped class group and control group. Prior to the class, the students in the flipped class group devoted significantly more time than those in the control group (42.33 ± 22.19 vs 30.55 ± 10.15, t = 4.586, P = 0.000), whereas after the class, the time spent by the two groups were not significantly different (56.50 ± 46.80 vs 54.62 ± 31.77, t = 0.317, P = 0.752)Back to article page