Table 1.

The Basic Sociodemographic, Clinical and Substance Use Characteristics of the Participants (n= 523)

Variables	Categories	Frequency	Percentage
Sex	Male	270	51.6
	Female	253	48.6
Age	18–20	148	28.3
	21–23	87	16.6
	24–26	149	28.5
	≥27	139	26.6
Ethnicity	Oromo	321	61.4
	Amhara	117	22.4
	Gurage	41	7.8
	Tigre	25	4.8
	Others*	19	3.6
Faculty	Engineering	110	21.0
	Health sciences	97	18.5
	Social science and humanities	85	16.3
	Natural and computational	89	17.0
	Business and economics	52	9.9
	School of Law	48	9.2
	Institute of education	42	8.0
Residence before campus	Urban	204	39.0
	Rural	319	61.0
Birth order	Frist or only child	123	23.5
	Middle	320	61.2
	Last	80	15.3
Year of study	First	130	24.9
	Second	133	25.4
	Third	107	20.5
	Fourth	77	14.7
	Fifth	76	14.5
Alcohol use	Yes	299	57.4
	No	127	42.5
Cigarette use	Yes	78	14.9
	No	53	67.9
Khat use	Yes	98	18.3
	No	67	68.4

Note: *Wolayta, Dawuro, Kefa, Sidama, Gurage, Silte.