Table 1 Comparison of unadjusted mean health-related quality of life (HRQoL) total scores among children with different demographic and socioeconomic characteristics
| Â | n (%) | HRQoL total score Unadjusted mean (s.d.) | P |
|---|---|---|---|
Total | 5734 (100.00) | 78.91 (13.56) | Â |
Gender | |||
 Male | 3124 (54.48) | 78.45 (13.87) | 0.005 |
 Female | 2610 (45.52) | 79.46 (13.17) |  |
Age (year) | |||
 8 | 601 (10.48) | 75.97 (14.16) | < 0.001 |
 9 | 1906 (33.24) | 78.57 (13.97) |  |
 10 | 1746 (30.45) | 79.26 (13.32) |  |
 11 | 1332 (23.23) | 80.47 (12.77) |  |
 12 | 149 (2.60) | 77.01 (13.29) |  |
School type | |||
 Private school | 1726 (30.10) | 75.43 (13.76) | < 0.001 |
 Public school | 4008 (69.90) | 80.41 (13.20) |  |
Weight category | |||
 Underweight | 373 (6.51) | 77.87 (13.12) | 0.476 |
 Healthy weight | 4187 (73.02) | 78.97 (13.67) |  |
 Overweight | 751 (13.10) | 78.92 (13.18) |  |
 Obesity | 423 (7.38) | 79.21 (13.51) |  |
Body perception | |||
 Just right | 1256 (21.90) | 82.01 (13.79) | < 0.001 |
 Too fat | 2467 (43.02) | 78.18 (13.44) |  |
 Too thin | 2011 (35.07) | 77.87 (13.29) |  |
BD | |||
 Not at all | 1256 (21.90) | 82.01 (13.79) | < 0.001 |
 Mild | 3018 (52.63) | 78.87 (13.04) |  |
 Moderate or high | 1460 (25.46) | 76.32 (13.88) |  |
Paternal education years (n = 5407) | |||
  < =9 | 2352 (43.50) | 76.92 (13.66) | < 0.001 |
 10–12 | 1619 (29.94) | 79.50 (13.12) |  |
  > 12 | 1436 (26.56) | 81.92 (12.74) |  |
Maternal education years (n = 5416) | |||
  < =9 | 2772 (51.18) | 76.86 (13.63) | < 0.001 |
 10–12 | 1346 (24.85) | 80.39 (12.69) |  |
  > 12 | 1298 (23.97) | 82.24 (12.76) |  |
Family income (n = 5038) | |||
 Low | 1926 (38.23) | 77.3 (13.83) | < 0.001 |
 Medium | 2072 (41.13) | 79.43 (13.15) |  |
 High | 1040 (20.64) | 81.54 (12.72) |  |