Table 1.

Univariate analysis of the associations between demographic characteristics and the risk of adolescent current smoking

Variables	Total(N = 7423)	Smokers (N = 170, %)	OR	95%CI	P value
Gender
Girls	3490	35(1.0)	1.000
Boys	3933	135(3.4)	3.509	2.442–5.178	< 0.001
Age
≤ 13	1447	10(0.7)	1.000
14–16	4070	71(1.7)	2.551	1.312–4.960	0.006
> 16	1906	89(4.7)	7.039	3.647–13.582	< 0.001
School level
JHSa	2663	27(1.0)	1.000
SHSb	3629	97(2.7)	2.681	1.772–4.197	< 0.001
VSHSc	1131	46(4.1)	4.139	2.579–6.772	< 0.001
Father’s education level
<Middle school graduate	466	18(3.9)	1.000
Middle school graduate	1788	43(2.4)	0.613	0.356–1.099	0.087
>Middle school graduate	5169	109(2.1)	0.536	0.331–0.920	0.016
Mother’s education level
<Middle school graduate	840	21(2.5)	1.000
Middle school graduate	1989	40(2.0)	0.800	0.474–1.390	0.414
>Middle school graduate	4594	109(2.4)	0.947	0.489–1.347	0.824
Family economic status
Average	3452	76(2.2)	1.000
Rich	3971	94(2.4)	1.077	0.794–1.465	0.634
Only child
No	5291	118(2.2)	1.000
Yes	2132	52(2.4)	1.096	0.782–1.516	0.586
Boarding in school
No	3726	73(2.0)	1.000
Yes	3697	97(2.6)	1.348	0.993–1.838	0.057

JHS^a: Junior high school

SHS^b: Senior high school

VSHS^c: Vocational senior high school