Regular cigarette status

Herbal cigarettes status

Shisha user status

Tombak user status

OR

95% CI

OR

95% CI

OR

95% CI

OR

95% CI

Lower

Upper

Lower

Upper

Lower

Upper

Lower

Upper

Age

1.35***

1.20

1.52

Males (students)

5.28***

3.26

8.56

7.96***

4.05

15.66

2.37**

1.33

4.23

9.33***

2.85

30.51

School location a

Urban a

1.70**

1.67

2.48

2.71**

1.52

4.83

Academic achievements b

Middle third b

1.29

0.83

2.00

2.33***

1.30

4.17

Bottom third b

3.04***

1.70

5.44

5.66***

2.77

11.59

R² = 17.3

R² = 13.9

R² = 5.8

R² = 8.3