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Björkman, M.P., Jyväkorpi, S.K., Strandberg, T.E. et al. The associations of body mass index, bioimpedance spectroscopy-based calf intracellular resistance, single-frequency bioimpedance analysis and physical performance of older people. Aging Clin Exp Res 32, 1077–1083 (2020). https://doi.org/10.1007/s40520-019-01301-8

The associations of body mass index, bioimpedance spectroscopy-based calf intracellular resistance, single-frequency bioimpedance analysis and physical performance of older people

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Author: Björkman, Mikko P.1; Jyväkorpi, Satu K.2; Strandberg, Timo E.2,3;
Organizations: 1Geriatric Unit, Department of Internal Medicine, Institute of Clinical Medicine, University of Helsinki, POB 20, 00014, Helsinki, Finland
2Department of General Practice and Primary Health Care, University of Helsinki, Helsinki, Finland
3Center for Life Course Health Research, University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe202003067519
Language: English
Published: Springer Nature, 2020
Publish Date: 2020-03-06
Description:

Abstract

Background: Bioimpedance skeletal muscle indices (SMI) are used as a surrogate for skeletal muscle mass, but their associations with physical functioning and obesity need further evaluation.

Aims: To compare the associations of body mass index (BMI), bioimpedance spectroscopy-based calf intracellular resistance (Cri-SMI), and single-frequency bioimpedance analysis (SF-SMI) indices with physical performance and the functioning of community-dwelling older people at risk of or already suffering from sarcopenia.

Methods: Pre-intervention measurements of the screened subjects and the participants of the Porvoo sarcopenia trial (N = 428) were taken. Cri-SMI, whole-body SF-SMI, and BMI were related to hand-grip strength, walking speed, short physical performance battery (SPPB), and the physical component of the RAND-36.

Results: Among the older people (aged 75–96), Cri-SMI correlated inversely with age (men r =- 0.113, p < 0.001; women r =- 0.287, p < 0.001), but positively with SPPB (r =0.241, p < 0.001) and the physical component of the RAND-36 (r =0.114, p =0.024), whereas BMI was inversely associated with SPPB (r =- 0.133, p < 0.001) and RAND-36 (r =- 0.286, p < 0.001). After controlling for age, gender, and comorbidity, one unit of Cri-SMI (cm2/Ω) was associated with a 3.3-fold probability of good physical performance (SPPB ≥ 9 points, OR =3.28, p < 0.001) and one unit of BMI (kg/m2) decreased the respective probability 4% (OR= 0.96, p =0.065). Physical inactivity partly explained the negative association of BMI. When Cri-SMI and BMI were controlled for, a 1% difference in Cri-SMI was associated with a 0.7% (p < 0.001) higher probability of good performance, the respective figure being - 2.2% (p =0.004) for BMI. The associations of SF-SMI with physical functioning indices were insignificant.

Conclusions: Independent of each other, Cri-SMI was positively and BMI was inversely associated with the physical performance and functioning of community-dwelling older people who were at risk of or already suffering from sarcopenia. We found no association between SF-SMI and physical functioning.

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Series: Aging clinical and experimental research
ISSN: 1594-0667
ISSN-E: 1720-8319
ISSN-L: 1594-0667
Volume: 32
Pages: 1077 - 1083
DOI: 10.1007/s40520-019-01301-8
OADOI: https://oadoi.org/10.1007/s40520-019-01301-8
Type of Publication: A1 Journal article – refereed
Field of Science: 3121 General medicine, internal medicine and other clinical medicine
Subjects:
Bioelectrical impedance
Intracellular resistance
Muscle strength
Physical performance
Sarcopenia
Article
Funding: Open access funding provided by University of Helsinki including Helsinki University Central Hospital. This study was funded by the University of Helsinki, Konung Gustav V:s och Drottning Victorias Frimurarestiftelse, the Yrjö Jahnsson Foundation, and Valio Ltd.
Copyright information: © Author(s) 2019. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
  https://creativecommons.org/licenses/by/4.0/