| 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 |