Table 1.

Group characteristics of the study cohort

	Total study population	Non-users	Moderate users	Intensive users	p value
Number of students	439	122	139	178
Sex					<0.001
Female (%)	66	50	69	74
Male (%)	34	50	31	26
Study					0.38
Biomedical Sciences (%)	26	21	29	26
Medicine (%)	74	79	71	74