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Body composition in patients with primary neuromuscular disease assessed by dual energy X-ray absorptiometry (DXA) and three different bioimpedance devices
Univ Gothenburg, Sahlgrenska Acad, Dept Internal Med & Clin Nutr, Gothenburg, Sweden.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Clinical diabetology and metabolism.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Clinical diabetology and metabolism.
Sahlgrens Univ Hosp, Neuromuscular Ctr, Dept Neurol, Gothenburg, Sweden.
2019 (English)In: Clinical Nutrition ESPEN, ISSN 2405-4577, Vol. 29, p. 142-148Article in journal (Refereed) Published
Abstract [en]

Background: Patients with primary neuromuscular disease have reduced muscle mass, and use of body mass index to assess nutritional status and body composition can therefore be questioned. Dual emission X-ray absorptiometry (DXA) can estimate muscle mass, but is not always readily available. Bioimpedance is a simple, portable and "easy to use" method for the assessment of body composition.

Objectives: To assess muscle mass by DXA in 143 patients with primary neuromuscular disease and validate three bioimpedance devices; Impedimed SFB7, (BISIMPEDIMED), Xitron4200 (BISXITRON) and Tanita MC180MA (MFBIATANITA).

Methods: Body composition was assessed by DXA in 143, by BISIMPEDIMED in 116, by MFBIATANITA in 104 and by BISXITRON in 35 patients.

Results: Muscle mass assessed by DXA, and phase angle (PhA) were below reference values in all female and 96% of male patients. BISIMPEDIMED underestimated muscle mass by 6.5±14.2 kg (p < 0.001), but this could be corrected after exclusion of resistance (Ri) values > 3500 Ohm (p = 0.84). MFBIATANITA over-estimated muscle mass by 30.8±9.1 kg (p < 0.001) with systematic bias, whereas BISXITRON was in agreement with DXA, and without systematic bias. Muscle mass was strongly correlated to PhA (rPEARSON = 0.75, p < 0.01).

Conclusion: Patients with primary neuromuscular disease have proportionally more fat and less muscle mass than the population in general, despite normal BMI. Muscle mass can be assessed by bioimpedance in these patients, but performance and bias depends on device. Phase angle by bioimpedance correlates to muscle mass, and could therefore potentially be used a surrogate measure of muscle mass during follow up.

Place, publisher, year, edition, pages
2019. Vol. 29, p. 142-148
Keywords [en]
Body composition, Neuromuscular disease, Bioimpedance, Phase angle, BIS, MFBIA, Dual energy x-ray absorptiometry (DXA)
National Category
Nutrition and Dietetics
Identifiers
URN: urn:nbn:se:uu:diva-375800DOI: 10.1016/j.clnesp.2018.11.004ISI: 000456061800022PubMedID: 30661678OAI: oai:DiVA.org:uu-375800DiVA, id: diva2:1288600
Available from: 2019-02-13 Created: 2019-02-13 Last updated: 2019-02-13Bibliographically approved

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Aldenbratt, AnnikaSvensson, Maria K.

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