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Table 2 Number of children in the different categories of waist circumference and BMI measured at age 12, for girls and boys separately

From: BMI, waist circumference at 8 and 12 years of age and FVC and FEV1 at 12 years of age; the PIAMA birth cohort study

  BMI
  Girls Boys
Waist circumference <10thpercentile ‘Normal’ >90thpercentile Total <10thpercentile ‘Normal’ >90thpercentile Total
<10th percentile 31 30 0 61 27 34 0 61
‘Normal’ 19 500 16 535 28 471 16 515
>90th percentile 0 21 38 59 0 19 38 57
Total 50 551 54 655 55 524 54 633
  1. Girls: 10th percentile of WC < −0.89SD, 90th percentile of WC >1.44SD; 10th percentile of BMI < −1.33SD, 90th percentile of BMI >1.44SD.
  2. Boys: 10th percentile of WC < −1.11SD, 90th percentile of WC >1.44SD; 10th percentile of BMI < −1.22SD, 90th percentile of BMI >1.67SD.