|
Variable
|
Boys
|
Girls
|
|---|
|
N
|
(%)a
|
AORb
|
(95% CI)
|
n
|
(%)a
|
AORb
|
(95% CI)
|
|---|
|
Grade
|
|
7th grade
|
3190
|
(93.2)
|
3.01
|
(2.52–3.58)
|
3393
|
(94.3)
|
2.42
|
(2.03–2.88)
|
|
8th grade
|
3041
|
(87.1)
|
1.78
|
(1.56–2.04)
|
3358
|
(90.1)
|
1.58
|
(1.36–1.84)
|
|
9th grade
|
2850
|
(83.6)
|
1.58
|
(1.37–1.82)
|
3334
|
(88.8)
|
1.49
|
(1.29–1.73)
|
|
10th grade
|
2693
|
(77.2)
|
1.23
|
(1.09–1.40)
|
3180
|
(87.0)
|
1.43
|
(1.25–1.63)
|
|
11th grade
|
2676
|
(71.5)
|
1.11
|
(1.00–1.24)
|
3147
|
(84.1)
|
1.26
|
(1.11–1.43)
|
|
12th grade
|
2431
|
(67.3)
|
1.00
| |
2985
|
(80.4)
|
1.00
| |
|
Current smoking status
|
|
Smoker
|
817
|
(32.1)
|
0.15
|
(0.13–0.16)
|
264
|
(33.6)
|
0.13
|
(0.11–0.16)
|
|
Non-Smoker
|
16,064
|
(85.6)
|
1.00
| |
19,133
|
(89.1)
|
1.00
| |
|
e-cigarette status
|
|
User
|
285
|
(32.5)
|
0.64
|
(0.53–0.78)
|
63
|
(29.4)
|
0.50
|
(0.32–0.78)
|
|
Non-User
|
16,596
|
(81.2)
|
1.00
| |
19,334
|
(87.7)
|
1.00
| |
|
Expose to Secondhand Smoke
|
|
Exposed
|
5073
|
(74.8)
|
0.85
|
(0.79–0.92)
|
6127
|
(84.7)
|
0.96
|
(0.88–1.05)
|
|
Non-exposed
|
11,808
|
(81.1)
|
1.00
| |
13,270
|
(88.2)
|
1.00
| |
|
Tobacco Advertise
|
|
Exposed
|
14,272
|
(79.5)
|
1.03
|
(0.92–1.15)
|
16,507
|
(87.6)
|
1.22
|
(1.10–1.35)
|
|
Non-exposed
|
2609
|
(76.9)
|
1.00
| |
2890
|
(83.9)
|
1.00
| |
|
Anti-Tobacco Advertisement
|
|
Exposed
|
14,701
|
(80.7)
|
1.34
|
(1.23–1.47)
|
17,710
|
(88.0)
|
1.55
|
(1.35–1.77)
|
|
Non-exposed
|
2180
|
(70.2)
|
1.00
| |
1687
|
(78.4)
|
1.00
| |
|
Experience of smoking prevention education in school
|
|
Yes
|
13,267
|
(81.0)
|
1.40
|
(1.28–1.53)
|
15,361
|
(88.0)
|
1.23
|
(1.12–1.36)
|
|
No
|
3614
|
(73.2)
|
1.00
| |
4036
|
(83.8)
|
1.00
| |
- AOR Adjusted odds ratio, CI Confidence interval
- aWeighted percentages considering the complex sample survey design
- bObtained from multinomial logistic regression analysis with control variables; Region, Family living structure, Perceived academic record, Perceived household economic status, Perceived stress, Depression experience, Current alcohol use
