Table 1 Characteristics of students from the first year of compulsory secondary education in Catalonia according to tobacco consumption, opinions, and social and family setting

Date of Birth

1992

4

0.14%

1

0.64%

5

0.20%

0.0000

1993

44

2.11%

20

12.74%

64

2.90%

1994

312

14.94%

58

36.94%

370

16.50%

1995

17280

82.76%

78

49.68%

1806

80.40%

Sex

Male

1078

51.63%

97

61.78%

1175

52.34%

0.0161

Female

1010

48.37%

60

38.22%

1070

47.66%

Immigration

No

1475

82.59%

74

70.48%

1549

81.91%

0.0037

Yes

311

17.41%

31

29.52%

342

18.09%

Socio-economic status

854

54.26%

60

73.17%

914

55.19%

0.0009

Low

450

28.59%

17

20.73%

467

28.20%

Medium

450

28.59%

17

20.73%

467

28.20%

High

270

17.15%

5

6.10%

275

16.61%

Smoker father

No

614

29.82%

33

21.57%

647

29.25%

Former smoker

610

29.63%

32

20.93%

642

29.02%

0.0003

Yes

835

40.55%

88

57.52%

923

41.73%

Smoker mother

No

957

46.08%

55

35.71%

1012

45.36%

0.0003

Former smoker

431

20.75%

23

14.94%

454

20.35%

Yes

689

33.17%

76

49.35%

765

34.29%

Smoking in siblings

No

1656

84.19%

89

59.73%

1745

82.47%

0.0000

Yes

311

15.81%

60

40.27%

371

17.53%

Smoking in friends

None

585

28.10%

6

3.85%

591

26.41%

0.0000

Some

951

45.68%

92

58.97%

1043

46.60%

Almost all

88

4.23%

44

28.21%

132

5.90%

All

11

0.53%

11

7.05%

22

0.98%

I don't know

447

21.47%

3

1.92%

450

20.11%

Smoking among teachers

None

37

1.78%

3

1.94%

40

1.79%

0.0072

Some

876

42.12%

63

40.65%

939

42.01%

Almost all

201

9.66%

18

11.61%

219

9.80%

All

19

0.91%

8

5.16%

27

1.21%

I don't know

947

45.53%

63

40.65%

1010

45.19%

Detrimental to health

Agree

2023

97.55%

143

92.26%

2166

97.18%

0.0000

Disagree

51

2.45%

12

7.75%

63

2.82%

Tobacco creates addiction

Agree

1971

95.31%

130

83.88%

2101

97.51%

0.0000

Disagree

97

4.69%

25

16.12%

122

5.49%

Tobacco is a drug

Agree

1837

88.88%

99

64.28%

1936

87.17%

Disagree

230

11.12%

55

35.72%

285

12.83%

Smoking is fashionable

Agree

1235

59.72%

96

62.33%

1331

59.90%

0.4218

Disagree

833

40.28%

58

37.67%

891

40.10%

Co-oximetry

< 6p.p.m

1863

95.30%

126

84.60%

1989

94.50%

0.0000

[6-10 p.p.m]

69

3.50%

13

8.70%

82

3.90%

> 10 p.p.m

23

1.20%

10

6.70%

33

1.60%