Measuring BMI change among children and adolescents

Details

• Alternative Title:
  Pediatr Obes
• Personal Author:
  Freedman, David S. ; Goodwin Davies, Amy J. ; Phan, Thao-Ly Tam ; Cole, F. Sessions ; Pajor, Nathan ; Rao, Suchitra ; Eneli, Ihuoma ; Kompaniyets, Lyudmyla ; Lange, Samantha J. ; Christakis, Dimitri A. ; Forrest, Christopher B.
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• Description:
  Background: ; Weight control programs for children monitor BMI changes using BMI z-scores that adjust BMI for the sex and age of the child. It is, however, uncertain if BMIz is the best metric for assessing BMI change. ; Objective: ; To identify which of 6 BMI metrics is optimal for assessing change. We considered a metric to be optimal if its short-term variability was consistent across the entire BMI distribution. ; Subjects: ; 285 643 2- to 17-year-olds with BMI measured 3 times over a 10- to 14-month period. ; Methods: ; We summarized each metric’s variability using the within-child standard deviation. ; Results: ; Most metrics’ initial or mean value correlated with short-term variability (jrj~ 0.3 to 0.5). The metric for which the within-child variability was largely independent (r = 0.13) of the metric’s initial or mean value was the percentage of the 50th expressed on a log scale. However, changes in this metric between the first and last visits were highly (r ≥ 0.97) correlated with changes in %95th and %50th. ; Conclusions: ; Log %50 was the metric for which the short-term variability was largely independent of a child’s BMI. Changes in log %50th, %95th, and %50th are strongly correlated.
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• Subjects:
  • Adolescent
  • Body Mass Index
  • Female
  • Humans
  • Pregnancy
• Source:
  Pediatr Obes. 17(6):e12889
• Pubmed ID:
  35064761
• Pubmed Central ID:
  PMC11135243
• Document Type:
  Journal Article
• Funding:
  CC999999/ImCDC/Intramural CDC HHSUnited States/
• Volume:
  17
• Issue:
  6
• Download URL:
  https://stacks.cdc.gov/view/cdc/157098/cdc_157098_DS1.pdf
• File Type:
  [PDF - 595.86 KB]
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:609b007f69c37cf11fc19dd1c5d9b9f0f1d22db43da819d77f17f6335384cf1c