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Table 2 Possible predicting factors in 7th grade (12–13 year olds) for smoking in 12th grade (17–18 year olds)

From: Predictors of smoking among Swedish adolescents

 

Non-smokers 12th grade

Smokers 12th grade

Univariable logistic regression 12th grade

Multivariable logistic regression 12th grade (n = 564)

Factors 7th grade

n (%)

n (%)

OR

CI

OR

CI

Gender (n = 646)

Boys

232 (80)

60 (20)

1.00

Ref

1.00

Ref

Girls

252 (71)

102 (29)

1.56

1.09-2.26

1.64

1.08-2.49

Age (n = 643)

12 years old

122 (80)

30 (20)

1.00

Ref

  

13 years old

345 (73)

129 (27)

1.52

0.97-2.38

  

14 years old

15 (88)

2 (12)

0.54

0.12-2.50

  

Country of birth (n = 645)

Born in Sweden

453 (74)

156 (26)

1.00

Ref

  

Born outside Sweden

30 (83)

6 (17)

0.58

0.24-1.42

  

Residence (n = 627)

City/Town

263 (75)

87 (25)

1.00

Ref

  

Village

122 (78)

35 (22)

0.87

0.56-1.36

  

Rural area

86 (72)

34 (28)

1.20

0.75-1.90

  

Parental education (n = 641)

High

277 (79)

73 (21)

1.00

Ref

  

Low

203 (70)

88 (30)

1.64

1.15-2.36

  

Mood in family (n = 632)

Good

436 (77)

133 (23)

1.00

Ref

  

Not good

36 (57)

27 (43)

2.46

1.44-4.20

  

Self-rated health (n = 641)

High

257 (78)

74 (22)

1.00

Ref

  

Medium

203 (75)

68 (25)

1.16

0.80-1.70

  

Low

20 (51)

19 (49)

3.30

1.67-6.51

  

Self-esteem (n = 635)

High

293 (81)

69 (19)

1.00

Ref

1.00

Ref

Medium

154 (70)

66 (30)

1.82

1.23-2.69

1.57

1.03-2.38

Low

28 (53)

25 (47)

3.79

2.08-6.91

2.79

1.46-5.33

Attitudes towards smoking (n = 640)

Very negative

433 (78)

119 (22)

1.00

Ref

1.00

Ref

Not very negative

46 (52)

42 (48)

3.32

2.09-5.29

2.81

1.70-4.66

Physical exercise (n = 617)

High

360 (75)

118 (25)

1.00

Ref

  

Low

98 (70)

41 (30)

1.28

0.84-1.94

  

Binge drinking (n = 634)

Never

456 (77)

136 (23)

1.00

Ref

  

Once or more

20 (48)

22 (52)

3.69

1.95-6.96

  

Snus use (n = 637)

No

452 (77)

133 (23)

1.00

Ref

1.00

Ref

Previous or current use

24 (46)

28 (54)

3.96

2.22-7.07

3.43

1.78-6.62

Smoking (n = 636)

No

473 (77)

142 (23)

1.00

Ref

  

Yes

6 (29)

15 (71)

8.33

3.17-21.86