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Table 1 Sample Characteristics

From: Associations between body mass index, weight control concerns and behaviors, and eating disorder symptoms among non-clinical Chinese adolescents

Characteristics Boys(n = 1525) Girls (n = 2019) Total (n = 3544) t or χ2
Age (years)     
  15.6 ± 0.6 15.6 ± 0.8 15.6 ± 0.7 -1.39
Weight Status1     
   Underweight 5.1% 5.8% 5.5% 142.91***
   Normal weight 72.5% 85.8% 82.8%  
   Overweight 14.8% 6.2% 10.5%  
   Obese 7.5% 2.1% 4.8%  
Perceived body weight     
   Underweight 28.1% 16.9% 21.7% 85.47***
   Normal weight 45.8% 46.6% 46.3%  
   Overweight 21.6% 32.1% 27.6%  
   Obese 3.8% 4.0% 3.9%  
Father's Educational Level2     
   Low 24.7% 28.5% 26.8% 19.94***
   Middle 53.9% 55.7% 31.6%  
   High 21.4% 15.8% 18.2%  
Mother's Educational Level2     
   Low 30.4% 34.3% 32.6% 24.12***
   Middle 53.5% 55.1% 54.4%  
   High 16.0% 10.6% 12.9%  
Family's Income3     
   Low 21.7% 29.1% 25.9% 50.12***
   Middle 51.9% 53.2% 52.7%  
   High 26.4% 17.6% 21.4%  
Father employment status4     
   Yes 78.3% 61.1% 69.7% 0.11
   No 21.7% 38.9% 30.3%  
Mother employment status4     
   Yes 68.3% 64.1% 66.2% 6.87**
   No 31.7% 35.9% 33.8%  
  1. 1 Defined according to the Chinese reference developed by the Working Group for Obesity in China (WGOC).
  2. 2 Educational level: Low: lower than junior middle school; Middle: high middle school; High: college/university or above
  3. 3 Family's income: Low: < 2000 Yuan/Month; Middle: 2000-6000 Yuan/Month; High: ≥6000 Yuan/Month
  4. 4 Parents' employment status: yes: have a job; no: housework, job-waiting/laid off, and retired.
  5. Significant difference between boys and girls, t-test for means or χ2-test for proportion, ** P < 0.01, *** P < 0.001.