Table 4 Prevalence odds ratio (POR) for cigarette smoking and 95% confidence interval (CI) among 11–15-year-old adolescents by study year, HBSC survey 1994–2006
From: Cigarette and waterpipe smoking among adolescents in Estonia: HBSC survey results, 1994–2006
Study year | POR (95% CI) | ||
|---|---|---|---|
Age groups | |||
11-year-olds | 13-year-olds | 15-year-olds | |
Boys | |||
1994 | 1 | 1 | 1 |
1998 | 1.64 (0.82–3.29) | 1.45 (0.97–2.17) | 1.09 (0.79–1.51) |
2002 | 1.96 (1.16–3.31) | 2.20 (1.57–3.07) | 1.42 (1.11–1.81) |
2006 | 1.19 (0.67–2.09) | 1.60 (1.13–2.25) | 1.16 (0.92–1.47) |
Girls | |||
1994 | 1 | 1 | 1 |
1998 | 3.36 (0.75–15.10) | 1.49 (0.77–2.86) | 2.24 (1.53–3.29) |
2002 | 5.92 (1.72–20.29) | 6.15 (3.69–10.25) | 3.30 (2.39–4.54) |
2006 | 3.44 (0.97–12.24) | 4.38 (2.60–7.38) | 3.26 (2.38–4.46) |