| 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 |