|
Age group
|
|
Before adolescents (male: 6–11 years, female:6–10 years)
|
2947
|
4293
|
551
|
< 0.001
|
|
Young adolescents (male: 12–15 years, Female: 11–14 years)
|
643
|
3044
|
823
| |
|
Elder adolescents (male: 15–17 years, Female: 16–17 years)
|
76
|
1285
|
1382
| |
|
Demographics
|
|
No. of participants
|
3666
|
8622
|
2756
| |
|
Male (%)
|
48.0
|
46.4
|
42.2
|
< 0.001
|
|
Age (years)
|
9.64(0.06)
|
11.37(0.04)
|
13.53(0.07)
|
< 0.001
|
|
From Northern area (%)
|
36.8
|
37.2
|
39.7
|
< 0.001
|
|
Monthly income of Family (%)
| | | |
< 0.001
|
|
≤ 5000 yuan
|
24.0
|
60.1
|
15.9
| |
|
> 5000 yuan
|
26.7
|
58.9
|
14.5
| |
|
Not willing to answer
|
23.9
|
55.0
|
21.0
| |
|
Mother’s education year (%)
| | | |
< 0.001
|
|
≤ 9
|
24.4
|
59.1
|
16.5
| |
|
10–12
|
25.5
|
59.5
|
15.0
| |
|
13–16
|
27.6
|
58.9
|
13.4
| |
|
≥ 16
|
29.2
|
56.1
|
14.7
| |
|
Puberty on-set (%)
|
8.0
|
27.5
|
59.0
|
< 0.001
|
|
Lifestyle
|
|
Physical activity(PA)
|
|
High-level PA (hour/day)
|
0.56(0.14)
|
0.52(0.01)
|
0.52(0.02)
|
< 0.001
|
|
Middle-level PA (hour/day)
|
0.56(0.02)
|
0.47(0.01)
|
0.46(0.02)
|
< 0.001
|
|
Walking (hour/day)
|
0.80(0.02)
|
0.76(0.02)
|
0.83(0.03)
|
< 0.001
|
|
Sedentary (hour/week)
|
34.70(0.52)
|
40.03(0.33)
|
45.42(0.62)
|
< 0.001
|
|
Dietary intake(serve/day)
|
|
Meat
|
1.14(0.02)
|
1.17(0.02)
|
1.25(0.03)
|
< 0.001
|
|
Sugar beverage
|
0.29(0.02)
|
0.41(0.01)
|
0.56(0.02)
|
< 0.001
|
|
Fruit
|
1.43(0.02)
|
1.26(0.01)
|
1.21(0.03)
|
< 0.001
|
|
Vegetable
|
1.94(0.03)
|
1.79(0.02)
|
1.71(0.03)
|
< 0.001
|
|
Anthropometry
|
|
Height (cm)
|
139.77(0.31)
|
148.07(0.20)
|
156.82(0.363)
|
< 0.001
|
|
Weight (kg)
|
33.22(0.24)
|
39.93(0.15)
|
47.43(0.28)
|
< 0.001
|
|
BMI
|
16.65(0.05)
|
17.70(0.03)
|
18.86(0.05)
|
< 0.001
|
