Table 3 Sample characteristic across sleep duration groups among children aged 6–18 years in urban Guangzhou, China
>9 hours (n = 1827) | 7–9 hours (n = 4678) | <7 hours (n = 1414) | P value | |
|---|---|---|---|---|
Age (years) | 9.2(2.3) | 11.1(3.2) | 14.6(2.6) | <0.001 |
Height(cm) | 135.71(0.40) | 145.34(0.27) | 158.93(0.39) | <0.001 |
Weight(kg) | 31.60(0.27) | 39.47(0.23) | 51.01(0.36) | <0.001 |
BMI(kg/m2) | 16.6(0.09) | 18.0(0.07) | 19.9(0.13) | <0.001 |
Dietary intake(servings/day) | ||||
Fruit | 1.35(0.029) | 1.20(0.015) | 1.17(0.031) | <0.001 |
Vegetable | 1.93(0.038) | 1.91(0.023) | 1.89(0.043) | 0.765 |
Meat | 1.53(0.032) | 1.58(0.021) | 1.70(0.039) | 0.008 |
Sugar beverage | 0.23(0.012) | 0.34(0.009) | 0.53(0.025) | <0.001 |
Physical activity (PA, hours/day) | ||||
HLPA | 0.46(0.014) | 0.41(0.009) | 0.39(0.015) | 0.003 |
MLPA | 0.47(0.016) | 0.37(0.008) | 0.36(0.015) | <0.001 |
Walking | 0.84(0.028) | 0.84(0.016) | 0.93(0.029) | 0.021 |
Sedentary | 4.09(0.085) | 4.53(0.054) | 4.44(0.109) | <0.001 |
Obesity (%) | 8.3 | 9.0 | 5.9 | 0.001 |
Age 6–12 years | ||||
Boys | 10.1 | 13.8 | 12.2 | 0.344 |
Girls | 5.5 | 7.1 | 10.2 | 0.113 |
In total | 8.8 | 10.1 | 10.5 | 0.211 |
Age 13–18 years | ||||
Boys | 4.7 | 9.1 | 5.3 | 0.016 |
Girls | 3.8 | 4.7 | 5.1 | 0.856 |
In total | 4.3 | 6.9 | 5.1 | 0.074 |