Table 1. Background variables of the participants (N = 2102).
| Background characteristics | n (%) / Mean (SD) |
|---|---|
| Age | 13.9 (1.2) |
| Sex | |
| Male | 1125 (53.5) |
| Female | 958 (45.6) |
| Missing | 19 (.9) |
| Place of birth | |
| Hong Kong | 1905 (90.6) |
| Not in Hong Kong | 176 (8.4) |
| Missing | 21 (1.0) |
| Living arrangement | |
| Live with both parents | 1689 (80.4) |
| Live with mother only | 227 (10.8) |
| Live with father only | 82 (3.9) |
| Live with neither of the parents | 85 (4.0) |
| Missing | 19 (.9) |
| Family monthly income (HKD) | |
| None or < $5,001 | 57 (2.7) |
| $5,001 - $10,000 | 32 (1.5) |
| $10,001 - $20,000 | 158 (7.5) |
| $20,001 - $30,000 | 183 (8.7) |
| $30,001 - $50,000 | 183 (8.7) |
| > $50,000 | 159 (7.6) |
| Not sure | 1312 (62.4) |
| Missing | 18 (.9) |
| Father’s education level | |
| Primary or below | 99 (4.7) |
| Secondary | 884 (42.1) |
| College or above | 501 (23.8) |
| Not sure | 602 (28.6) |
| Missing | 16 (.8) |
| Mother’s education level | |
| Primary or below | 118 (5.6) |
| Secondary | 949 (45.1) |
| College or above | 430 (20.4) |
| Not sure | 586 (27.9) |
| Missing | 19 (.9) |