Table 1. Pretest and posttest mean score of knowledge levels for each course's section.

	Median ( Minimum-Maximum)	Mean ± S.D	P-value
Pretest study design score	4 (2-7)	4.23±1.51	< 0.001
Posttest study design score	10.50 (2-16)	10.23±3.71
Pretest literature review score	2 (0-5)	2.20±1.19	0.027
Posttest literature review score	3 (1-6)	2.77±1.34
Pretest research question	4 (2-9)	4.32±1.52	0.156
Posttest research question	4.50 (1-8)	4.75±1.74
Pretest biostatistics score	4 (2-7)	4.23±1.51	0.476
Posttest biostatistics score	5 (1-7)	4.43±1.55