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Table 3 Two types of classification of adult underweight, overweight and obesity

From: Classical risk factors of cardiovascular disease among Chinese male steel workers: a prospective cohort study for 20 years

  BMI (kg/m2) CVD events Number Person years Incidence (per
1000 person years)
HR 95%CI Pvalue
The WHO classification †         
   Underweight < 18.5 5 99 1999 2.5 0.7 0.29-1.69 0.43
   Normal range 18.5-24.9 254 3151 64748 3.92 1 -  
   Overweight ≥ 25.0 132 988 19541 6.76 1.25 1.00-1.55 < 0.05
Pre-obesity 25.0-29.9 120 929 18450 6.5 1.22 0.97-1.52 0.09
Obesity ≥ 30.0 12 59 1091 11 1.72 0.96-3.08 0.07
The Chinese Classification ‡         
   Underweight < 18.5 5 99 1999 2.5 0.72 0.29-1.74 0.46
   Normal range 18.5-23.9 204 2655 54726 3.73 1 -  
   Overweight ≥ 24.0 182 1484 56725 3.21 1.24 1.01-1.52 < 0.05
Pre-obesity 24.0-27.9 145 1265 25398 5.71 1.21 0.97-1.50 0.09
Obesity ≥ 28.0 37 219 4165 8.88 1.37 0.96-1.97 0.09
  1. Adjusted for age, TC, BMI, SBP, and daily cigarette dosage.
  2. † According to World Health Organization' web http://apps.who.int/bmi/index.jsp?introPage=intro_3.html
  3. ‡ According to Chinese overweight and obesity prevention guideline