Gender, n (%)
Male	831 (54.0)
Female	708 (46.0)
Age (years), mean (SD)	6.6 (0.42)
Measures of socioeconomic status
Maternal university education: n (%)
Yes	963 (62.6)
No	576 (37.4)
Paternal university education: n (%)
Yes	1005 (65.3)
No	534 (34.7)
Weight status, n (%)
Underweight	75 (4.9)
Healthy weight	1189 (77.2)
Overweight	165 (10.7)
Obese	110 (7.2)
Underweight/healthy weight compared with overweight/obese, n (%)
Underweight/healthy weight	1264 (82.1)
Overweight/obese	275 (17.9)
BMI, mean (SD)	15.45 (2.13)
BMI z score, mean (SD)	-0.12 (1.29)
CHU-9D mean score (SD)
Using UK tariff	0.937 (0.068)
Using Chinese tariff	0.920 (0.094)
PedsQL™ mean score (SD)
Total scale score	82.92 (11.21)
Physical functioning	83.67 (13.15)
Psychosocial functioning	82.52 (12.36)
Emotional functioning	81.69 (17.54)
Social functioning	84.09 (15.30)
School functioning	81.77 (15.36)