Characteristics	Addis Ababa	Adama	Total
Gender
Male	8	9	17
Female	4	4	8
Age group
15-16	2	0	2
17-19	9	12	21
20-22	1	1	2
Grade
9	2	4	6
10	8	7	15
11	1	2	3
School dropout from grade 10	1	0	1
School type
Government	10	9	19
Private	2	4	6
Shisha smoking experience (Duration of use)
Previous user (< 1 months)	1	2	3
Previous user (3 years)	0	1	1
Regular user (<=1 year)	1	2	3
Regular user (2 years)	5	4	9
Regular user (3+ years)	5	4	9
Total	12	13	25