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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 (%)
CECHNBMaleFemaleBothMaleFemaleBoth
+41.140.340.838.443.239.8
++7.86.57.311.66.010.0
++5.64.45.18.17.98.0
+++9.612.310.716.710.214.8
+26.327.526.820.023.621.1
+5.04.44.72.75.53.5
++4.64.64.62.43.52.7
Proportions of students who currently used either
   Grades 7–9, current use (%)Grades 10–12, current use (%)
CECHNBMaleFemaleBothMaleFemaleBoth
+23.320.922.430.729.930.5
++4.63.24.16.86.66.8
++4.79.96.613.717.414.6
+++18.728.522.416.014.615.7
+31.328.630.321.316.020.0
+10.07.79.16.59.57.3
++7.31.15.04.96.05.1
  1. Proportions excluding those who did not smoke any products
  2. C combustible cigarette, EC electronic cigarette, HNB heat-not-burn tobacco