Assessing body composition with DXA and bioimpedance

Effects of obesity, physical activity, and age

Eszter Völgyi, Frances Tylavsky, Arja Lyytikäinen, Harri Suominen, Markku Alén, Sulin Cheng

Research output: Contribution to journalArticle

147 Citations (Scopus)

Abstract

Objective:This study evaluated to what extent dual-energy X-ray absorptiometry (DXA) and two types of bioimpedance analysis (BIA) yield similar results for body fat mass (FM) in men and women with different levels of obesity and physical activity (PA).Methods and Procedures:The study population consisted of 37-81-year-old Finnish people (82 men and 86 women). FM was estimated using DXA (GE Lunar Prodigy) and two BIA devices (InBody (720) and Tanita BC 418 MA). Subjects were divided into normal, overweight, and obese groups on the basis of clinical cutoff points of BMI, and into low PA (LPA) and high PA (HPA) groups. Agreement between the devices was calculated by using the Bland-Altman analysis.Results:Compared to DXA, both BIA devices provided on average 2-6 lower values for FM in normal BMI men, in women in all BMI categories, and in both genders in both HPA and LPA groups. In obese men, the differences were smaller. The two BIA devices provided similar means for groups. Differences between the two BIA devices with increasing FM were a result of the InBody (720) not including age in their algorithm for estimating body composition.Discussion:BIA methods provided systematically lower values for FM than DXA. However, the differences depend on gender and body weight status pointing out the importance of considering these when identifying people with excess FM.

Original languageEnglish (US)
Pages (from-to)700-705
Number of pages6
JournalObesity
Volume16
Issue number3
DOIs
StatePublished - Mar 1 2008

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Photon Absorptiometry
Body Composition
Obesity
Fats
Exercise
Equipment and Supplies
Adipose Tissue
Body Weight
Population

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Nutrition and Dietetics

Cite this

Assessing body composition with DXA and bioimpedance : Effects of obesity, physical activity, and age. / Völgyi, Eszter; Tylavsky, Frances; Lyytikäinen, Arja; Suominen, Harri; Alén, Markku; Cheng, Sulin.

In: Obesity, Vol. 16, No. 3, 01.03.2008, p. 700-705.

Research output: Contribution to journalArticle

Völgyi, Eszter ; Tylavsky, Frances ; Lyytikäinen, Arja ; Suominen, Harri ; Alén, Markku ; Cheng, Sulin. / Assessing body composition with DXA and bioimpedance : Effects of obesity, physical activity, and age. In: Obesity. 2008 ; Vol. 16, No. 3. pp. 700-705.
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