Table 3 Result of the binary logistic regression analysis for the characteristics related to lifetime tobacco use among the participants across 2014, 2015 and 2016

 2014

–

1

–

1

 2015

0.358

1.2 [0.8,1.6]

0.955

1.0 [0.7,1.4]

 2016

0.001

1.7 [1.2,2.3]

0.002

1.7 [1.2,2.4]

Age

< 0.001

0.000

  > 13 years

2.1 [1.6,2.7]*

2.3 [1.7,3.1]

  ≤ 13 years

1

1

Sex

< 0.001

< 0.001

 Male

3.9 [2.9,5.2]*

4.4 [3.2,6.1]

 Female

1

1

Current anxiety problem

< 0.001

< 0.000

 Yes

1.7 [1.3,2.3]*

1.8 [1.4,2.4]

 No

Lifetime illicit substances use

< 0.001

0.033

 Yes

9.1 [3.1,26.7]*

3.9 [1.1, 13.8]

 No

1

1

Lifetime inhalant use

0.042

0.015

 Yes

1.8 [1.1,3.3]*

2.2 [1.2,4.3]

 No

1

1

Tobacco use among the father

< 0.001

0.015

 Yes

1.6 [1.2,2.1]*

2.2 [1.2,4.3]

 No

Tobacco use among siblings

< 0.001

1

0.003

1

 Yes

2.0 [1.4,2.7]*

1.7 [1.2,2.4]

 No

1

1