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Table 3 Junior high (grades 7–9) and high school (grades 10–12) students’ age-adjusted prevalence of combined smoking by gender

From: Heat-not-burn tobacco, electronic cigarettes, and combustible cigarette use among Japanese adolescents: a nationwide population survey 2017

Proportions of students who ever used either

   

Grades 7–9, ever use (%)

Grades 10–12, ever use (%)

C

EC

HNB

Male

Female

Both

Male

Female

Both

+

41.1

40.3

40.8

38.4

43.2

39.8

+

+

7.8

6.5

7.3

11.6

6.0

10.0

+

+

5.6

4.4

5.1

8.1

7.9

8.0

+

+

+

9.6

12.3

10.7

16.7

10.2

14.8

+

26.3

27.5

26.8

20.0

23.6

21.1

+

5.0

4.4

4.7

2.7

5.5

3.5

+

+

4.6

4.6

4.6

2.4

3.5

2.7

Proportions of students who currently used either

   

Grades 7–9, current use (%)

Grades 10–12, current use (%)

C

EC

HNB

Male

Female

Both

Male

Female

Both

+

23.3

20.9

22.4

30.7

29.9

30.5

+

+

4.6

3.2

4.1

6.8

6.6

6.8

+

+

4.7

9.9

6.6

13.7

17.4

14.6

+

+

+

18.7

28.5

22.4

16.0

14.6

15.7

+

31.3

28.6

30.3

21.3

16.0

20.0

+

10.0

7.7

9.1

6.5

9.5

7.3

+

+

7.3

1.1

5.0

4.9

6.0

5.1

  1. Proportions excluding those who did not smoke any products
  2. C combustible cigarette, EC electronic cigarette, HNB heat-not-burn tobacco