Table 1 Socio-demographic characteristics of participants by eating speed.

From: Eating fast is positively associated with general and abdominal obesity among Chinese children: A national survey

Variables All Eating speed P
Slow Medium Fast
n 50037 11671 25613 12753  
Boys, % 51.1 46.0 48.5 60.9 <0.001
Age, (years)* 11.28 ± 3.07 10.85 ± 3.11 11.27 ± 2.98 11.68 ± 3.17 <0.001
Paternal educational level, %      <0.001
  Primary school or below 7.5 7.2 7.2 8.2  
  Junior high school 37.0 35.5 37.3 37.8  
  High school 27.7 28.3 27.2 28.0  
  Junior college or above 27.9 29.0 28.2 26.1  
Maternal educational level, %      0.001
  Primary school or below 10.3 10.2 10.0 10.8  
  Junior high school 38.2 36.8 38.5 38.8  
  High school 26.1 26.7 25.8 26.2  
  Junior college or above 25.4 26.3 25.6 24.2  
Family monthly income, %      0.026
≤2000, RMB 7.7 7.9 7.7 7.5  
  2001~5000, RMB 24.9 25.5 24.5 25.2  
  5001~7999, RMB 18.5 18.3 18.7 18.4  
≥8000, RMB 19.8 19.9 19.4 20.6  
  No answer 29.0 28.3 29.7 28.2  
Family history of obesity, % 22.2 22.9 21.0 24.3 <0.001
Physical activity, (min, mean ± SE)      <0.001
  Light 46.26 ± 0.31 44.32 ± 0.66 45.91 ± 0.42 48.71 ± 0.64  
  Medium 28.31 ± 0.21 25.23 ± 0.41 28.65 ± 0.28 30.39 ± 0.45  
  Vigorous 31.72 ± 0.22 27.85 ± 0.44 31.93 ± 0.31 34.66 ± 0.47  
Height, (cm)* 148.18 ± 15.89 144.69 ± 15.89 148.38 ± 15.43 150.99 ± 16.19 <0.001
Weight, (kg)* 42.68 ± 15.24 38.67 ± 13.83 42.46 ± 14.60 46.80 ± 16.64 <0.001
BMI, (kg/m2)* 18.83 ± 3.79 17.88 ± 3.44 18.73 ± 3.64 19.90 ± 4.11 <0.001
WC, (cm)* 65.86 ± 10.66 63.05 ± 9.84 65.70 ± 10.27 68.77 ± 11.40 <0.001
WHtR* 0.44 ± 0.05 0.436 ± 0.05 0.443 ± 0.05 0.460 ± 0.06 <0.001
  1. *Values are shown as mean ± standard deviation.
  2. Differences of age across eating speed was tested by using T-test, whereas differences of physical activity time, height, weight, body mass index (BMI), waist circumference (WC) and waist height ratio (WHtR) across different eating speed groups were tested by using analysis of covariance.
  3. For categorical variables, differences of gender, parental and maternal educational, family history of obesity and family monthly income between eating speed groups were evaluated by using Pearson Chi-Square test.