11–12 years |
Crude rates |
Never |
1 |
1 |
1 |
|
|
Sometimes, often or always |
1.73 (1.10–2.73) (p=0.02) |
1.19 (0.79–1.79) (p=0.40) |
1.84 (1.23–2.72) (p=0.003) |
|
Adjusted for socio-demographic factors (p<0.001) |
Never |
1 |
1 |
1 |
|
|
Sometimes, often or always |
2.02 (1.24–3.29) (p=0.005) |
1.18 (0.78–1.80) (p=0.43) |
2.09 (1.37–3.18) (p=0.001) |
13–14 years |
Crude rates |
Never |
1 |
1 |
1 |
|
|
Sometimes, often or always |
1.72 (1.16–2.54) (p=0.01) |
1.39 (0.96–2.02) (p=0.08) |
1.99 (1.31–2.77) (p=0.001) |
|
Adjusted for socio-demographic factors (p<0.001) |
Never |
1 |
1 |
1 |
|
|
Sometimes, often or always |
1.76 (1.16–2.66) (p=0.01) |
1.53 (1.04–2.25) (p=0.03) |
2.04 (1.37–3.03) (p<0.001) |
15–17 years |
Crude rates |
Never |
1 |
1 |
1 |
|
|
Sometimes, often or always |
1.32 (0.87–2.02) (p=0.19) |
1.22 (0.84–1.76) (p=0.29) |
1.32 (0.88–1.97) (p=0.17) |
|
Adjusted for socio-demographic factors (p<0.001) |
Never |
1 |
1 |
1 |
|
|
Sometimes, often or always |
1.10 (0.70–1.73) (p=0.68) |
1.24 (0.83–1.84) (p=0.29) |
1.53 (1.00–2.35) (p=0.05) |