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Table 1 Characteristics of participating children aged 6–12 years in Shanghai, China, 2012

From: Lifestyle factors associated with childhood obesity: a cross-sectional study in Shanghai, China

  Total N = 2400 Girls N = 1190 Boys N = 1210 P * (chi-square test)
n(%) % %
Weight status     <0.01
Non-overweight 1706(73.2) 82.6 63.8
Overweight 364(15.6) 9.4 21.8
Obese 262(11.2) 8.0 14.4
Maternal education Level     0.17
Primary school 203(8.8) 7.7 9.8
High school 1094(47.4) 47.3 47.5
College/University or above 1012(43.8) 45.0 42.7
Household income (RMB/month)     0.12
≤3000 412(20.6) 19.0 22.2
3001-8000 910(45.5) 45.5 45.6
≥8001 676(33.9) 35.5 32.2
Screen time (hrs./day)     0.10
≤2 2038(84.9) 86.5 83.4
2-3 239(10.0) 9.1 10.8
>3 123(5.1) 4.5 5.8
Physical activity (hrs./day)     0.91
≤2 1942(80.9) 80.9 80.9
2-3 292(12.2) 12.4 12.0
>3 166(6.9) 6.7 7.1
Modes of travel to/from school     0.01
Inactive (others) 1160(49.2) 52.0 53.5
Active (walking/cycling) 1196(50.8) 48.0 46.5
Sugar-sweetened beverage (cps/wk.)     <0.01
≤2 1497(63.4) 66.3 60.6
2-5 256(10.8) 10.3 11.3
5-7 483(20.5) 19.6 21.3
>7 125(5.3) 3.8 6.8
Snacks     
Healthy Snacks     0.68
Hardly eat 26(1.1) 1.1 1.1
1-2/wk. 142(6.1) 5.5 6.7
3-4/wk. 364(15.6) 15.8 15.5
≥5/wk. 1795(77.2) 77.6 76.7
Energy dense, nutrient poor     0.03
Hardly eat 142(6.1) 5.8 6.4
1-2/wk. 964(41.3) 41.6 41.1
3-4/wk. 779(33.4) 35.5 31.3
≥5/wk. 447(19.2) 17.1 21.3
Others     0.01
Hardly eat 40(1.7) 1.5 2.0
1-2/wk. 242(10.4) 10.5 10.3
3-4/wk. 530(22.8) 25.6 20.0
≥5/wk. 1512(65.1) 62.4 67.7
  1. *P is for testing gender differences; Bold numbers refer to P<0.05.
  2. Weight status was defined according to WHO Child Growth Standards, BMI-for-age (5–19 years).