Fig. 2
Comparison of the pre- and post-knowledge test results of the pre-COVID group (npre = 134) and the mid-COVID group (nmid = 42) with no significant difference between pretests (p = 0.726) and posttests (p = 0.674) of both groups in direct comparison. Statistically significant gain in knowledge from pretest to posttest in both pre-COVID and mid-COVID groups (p < 0.01)