Table 1. Sample distribution by group and gender.

Sample characteristics		Students, n (%)
Group	A	125 (33.6)
	B	153 (41.1)
	C	94 (25.3)
Gender	Male	138 (37.1)
	Female	234 (62.9)

A: first- and second-year students; B: third- and fourth-year students; and C: fifth- and sixth-year students.