Junior high school students | High school students | ||||||||
OR | 95%CI | P | OR | 95%CI | P | ||||
School year | 1.17 | 1.04 | 1.32 | 0.01 | 1.21 | 1.10 | 1.33 | 0.00 | |
Sex | Male | Reference | Reference | ||||||
Female | 0.61 | 0.50 | 0.74 | 0.00 | 0.39 | 0.33 | 0.46 | 0.00 | |
Father smokes | 0.96 | 0.79 | 1.16 | 0.65 | 1.27 | 1.09 | 1.48 | 0.00 | |
Mother smokes | 3.24 | 2.63 | 3.99 | 0.00 | 2.62 | 2.16 | 3.18 | 0.00 | |
Older brother smokes | 2.74 | 1.99 | 3.79 | 0.00 | 2.21 | 1.78 | 2.75 | 0.00 | |
Older sister smokes | 3.78 | 2.44 | 5.87 | 0.00 | 3.28 | 2.36 | 4.56 | 0.00 |