Details view: Limited diagnostic accuracy

Limited diagnostic accuracy Evidence1 #371490 The diagnostic accuracy of BMI to diagnose obesity is limited, particularly for individuals in the intermediate BMI ranges.

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Limited diagnostic accuracy

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Link[1] Accuracy of Body Mass Index to Diagnose Obesity In the US Adult Population

Citerend uit: A. Romero-Corral, V. K. Somers, J. Sierra-Johnson et al.
Publication info: 2008 June, International journal of obesity (2005) 2008;32(6):959-966. doi:10.1038/ijo.2008.11.
Geciteerd door: David Price 3:15 PM 3 January 2015 GMT
Citerank: (1) 399942
URL:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2877506/

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Body mass index (BMI) is the most widely used measure to diagnose obesity. However, the diagnostic accuracy of BMI to detect excess in body adiposity is largely unknown.

Despite the good correlation between BMI and BF %, the diagnostic accuracy of BMI to diagnose obesity is limited, particularly for individuals in the intermediate BMI ranges. A BMI cut-off of ≥ 30 kg/m2 has a good specificity but misses more than half of people with excess fat. These results help to explain the U and J-shape association between BMI and outcomes.

Link[2] Three limitations of the body mass index

Citerend uit: Stanley M. Garn, Wiliam R. Leonard, Victor M. Hawthorne
Publication info: 1986, Am J Clin Mar 1986;44:996-7
Geciteerd door: David Price 3:22 PM 3 January 2015 GMT
Citerank: (1) 399942
URL:

http://ajcn.nutrition.org/content/44/6/996.full.pdf

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Although the wt/ht2 or Body Mass Index (BMI) has attained growing popularity in the past few years, the two components of this index and their relative weighting suggest possible limitations on its use. Since stature (i.e., standing height) is one component, the BMI may be stature dependent over at least part of the age range. Again, the use of stature as a divisor suggest that the BMI may also be affected by relative leg length or relative siting height. Finally, the use of weight as the numerator suggest that the BMI-like weight itself-may reflect both lean tissue and fat tissue to a comparable degree.

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