| Smokinga | Drinkingb | Feeling sickc | Internet addictiond |
---|---|---|---|---|
Parental migration status (ref: N-LBC) | Â | Â | Â | |
 B-LBC | 1.04 (0.79, 1.37) | 1.14 (0.91, 1.42) | 3.15 (1.51, 6.61)** | 1.91 (1.33, 2.76)** |
 O-LBC | 1.03 (0.77, 1.38) | 1.06 (0.84, 1.34) | 2.22 (0.99, 4.96) | 1.33 (0.89, 1.98) |
Gender (ref: male) | Â | Â | Â | Â |
 Female | 0.59 (0.47, 0.76)*** | 0.80 (0.66, 0.96)* | 1.53 (0.85, 2.74) | 0.75 (0.55, 1.03) |
Age | 1.34 (1.21, 1.48)*** | 1.34 (1.24, 1.45)*** | 0.98 (0.78, 1.22) | 1.48 (1.29, 1.69)*** |
Perceived income level (ref: much better off/better off/the same) | Â | |||
 Poorer/much poorer | 1.20 (0.77, 1.74) | 0.84(0.60, 1.19) | 0.96 (0.33, 2.82) | 1.20 (0.68, 2.11) |
Any sibling (ref: yes) | Â | Â | Â | Â |
 No | 0.83 (0.65, 1.07) | 0.89 (0.73, 1.08) | 0.92 (0.51, 1.66) | 0.80 (0.57, 1.12) |