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Associations of height, weight, and body mass index with handgrip strength: A Bayesian comparison in older adults
Journal article   Peer reviewed

Associations of height, weight, and body mass index with handgrip strength: A Bayesian comparison in older adults

Yong-Hao Pua, Laura Tay, Ross Allan Clark, Julian Thumboo, Ee-Ling Tay, Shi-Min Mah and Yee-Sien Ng
Clinical Nutrition ESPEN, Vol.54, pp.206-210
2023
DOI: https://doi.org/10.1016/j.clnesp.2023.01.028
PMID: 36963864
url
https://doi.org/10.1016/j.clnesp.2023.01.028View
Published Version

Abstract

Bayesian analysis Body size Handgrip strength Normalization Older adults
Background & aims: Handgrip strength is commonly normalized or stratified by body size to define subgroup-specific cut-points and reference limits values. However, it remains unclear which anthropometric variable is most strongly associated with handgrip strength. We aimed to, in older adults with no self-reported mobility limitations, determine whether height, weight, and body mass index (BMI) were meaningfully associated with handgrip strength. Methods: This cross-sectional study included community-dwelling ambulant participants, and we identified 775 older adults who reported no difficulty walking 100 m, climbing stairs, and rising from the chair. Handgrip strength was measured with a digital dynamometer. Bayesian linear regression was used to estimate the probabilities that the positive associations of height, weight, and BMI with handgrip strength exceeded 0 kg (the null value) and 2.5 kg (the clinically meaningful threshold value). Results: Mean handgrip strength was 22.1 kg (SD, 4) for women and 32.9 kg (SD, 6) for men. Body height, weight, and BMI had >99.9% probabilities of a positive association with handgrip strength; however, the associations of per interquartile increase in body weight and BMI with handgrip strength had low probabilities (<5%) of exceeding the clinically meaningful threshold of 2.5 kg. In contrast, body height had the highest probability (99.6%) of a clinically meaningful association with handgrip strength: adjusting for age and gender, handgrip strength was 3.2 kg (95% CrI, 2.7 to 3.8) greater in older adults 1.61 m tall than in older adults 1.51 m tall. Conclusions: In a large sample of mobile-intact older adults, handgrip strength differed meaningfully by body height. Although requiring validation, our findings suggest that future efforts should be directed at normalizing handgrip strength by body height to better define subgroup-specific handgrip weakness. A web-based application (https://sghpt.shinyapps.io/ippts/) was created to allow interactive exploration of predicted values and reference limits of age-, gender-, and height-subgroups.

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