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Table 2 Junior high (grades 7–9) and high school (grades 10–12) students’ age-adjusted smoking prevalence rates by gender

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

 

Ever C use

Ever EC use

Ever HNB use

%

95% CI

%

95% CI

%

95% CI

Grades 7–9

 Male

3.1

3.0, 3.2

2.4

2.3, 2.5

1.3

1.3, 1.3

 Female

2.1**

2.0, 2.2

1.7**

1.6, 1.8

0.9*

0.9, 0.9

 Both

2.6

2.5, 2.7

2.1

2.0, 2.2

1.1

1.0, 1.2

Grades 10–12

 Male

6.9

6.6, 7.2

4.9

4.7, 5.1

2.9

2.8, 3.0

 Female

3.3**

3.2, 3.4

2.1**

2.1, 2.1

1.4**

1.4, 1.4

 Both

5.1

4.8, 5.4

3.5

3.3, 3.7

2.2

2.0, 2.4

 

Current C use

Current EC use

Current HNB use

%

95% CI

%

95% CI

%

95% CI

Grades 7–9

 Male

0.7

0.7, 0.7

0.8

0.8, 0.8

0.6

0.6, 0.6

 Female

0.5

0.5, 0.5

0.5**

0.5, 0.5

0.4

0.4, 0.4

 Both

0.6

0.5, 0.7

0.7

0.6, 0.8

0.5

0.5, 0.5

Grades 10–12

 Male

2.0

1.9, 2.1

1.5

1.4, 1.6

1.2

1.1, 1.3

 Female

0.9**

0.9, 0.9

0.5**

0.5, 0.5

0.6**

0.6, 0.6

 Both

1.5

1.4, 1.6

1.0

0.9, 1.1

0.9

0.8, 1.0

 

Daily C use

Daily EC use

Daily HNB use

%

95% CI

%

95% CI

%

95% CI

Grades 7–9

 Male

0.2

0.2, 0.2

0.1

0.1, 0.1

0.1

0.1, 0.1

 Female

0.1

0.1, 0.1

0.1

0.1, 0.1

0.1

0.1, 0.1

 Both

0.1

0.1, 0.1

0.1

0.1, 0.1

0.1

0.0, 0.2

Grades 10–12

 Male

0.7

0.6, 0.8

0.1

0.1, 0.1

0.1

0.1, 0.1

 Female

0.2**

0.2, 0.2

0.1

0.1, 0.1

0.0**

0.0, 0.0

 Both

0.5

0.4, 0.6

0.1

0.1, 0.1

0.1

0.1, 0.1

  1. C combustible cigarette, EC electronic cigarette, HNB heat-not-burn tobacco, CI confidence interval
  2. Two proportion Z-tests were conducted to compare male and female. **P < 0.01, *P < 0.05
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BMC Public Health

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