Relying solely on BMI to assess obesity may not be accurate.
which advises that BMI"be used in conjunction with other valid measures of risk such as, but not limited to, measurements of visceral fat, body adiposity index, body composition, relative fat mass, waist circumference, and genetic/metabolic factors."
He said that dual-energy X-ray absorptiometry is not practical nor cost-effective for obesity screening in routine practice. Therefore, he predicts that waist circumference, often expressed as waist-to-height ratio, will be measured more often, although he acknowledged that waist measurement can be difficult. However, better physician training on the measure should help it become the norm.
Bioimpedance scales will provide more standardized measurements than waist circumference and"revolutionize how we measure obesity," Visaria predicted. They are"very accessible and cheap," he noted, with many models sold for less than $100. The study by Visaria and colleagues used data from 9784 US adults ages 20-59 years in several National Health and Nutrition Examination Surveys in 2011-2018.
Among the 64% of the study group who were not obese by BMI, DEXA scans showed 53% of this subgroup did have obesity based on body fat content. Among those with a normal BMI, 43% had obesity by DEXA result.
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