Dataset Information

Sarcopenia-related parameters and incident disability in older persons: results from the "invecchiare in Chianti" study.

ABSTRACT:

Background

Current operational definitions of sarcopenia are based on algorithms' simultaneous considering measures of skeletal muscle mass and muscle-specific as well as global function. We hypothesize that quantitative and qualitative sarcopenia-related parameters may not be equally predictive of incident disability, thus presenting different clinical relevance.

Methods

Data are from 922 elder adults (mean age = 73.9 years) with no activities of daily living (ADL) impairment recruited in the "Invecchiare in Chianti" study. Incident disability in ≥1 ADL defined the outcome of interest. The specific capacities of following sarcopenia-related parameters at predicting incident ADL disability were compared: residuals of skeletal muscle mass, fat-adjusted residuals of skeletal muscle mass, muscle density, ankle extension strength, ratio ankle extension strength/muscle mass, gait speed, and handgrip strength.

Results

During the follow-up (median = 9.1 years), 188 (20.4%) incident ADL disability events were reported. Adjusted models showed that only gait speed was significantly associated with the outcome in both men (per standard deviation [SD] = 0.23 m/s increase, hazard ratio [HR] = 0.46, 95% confidence interval [CI] = 0.33-0.63; p < .001) and women (per SD = 0.24 m/s increase, HR = 0.64, 95% CI = 0.50-0.82; p < .001). In women, the fat-adjusted lean mass residual (per SD = 4.41 increase, HR = 0.79, 95% CI = 0.65-0.96; p = .02) and muscle density (per SD = 3.60 increase, HR = 0.76, 95% CI = 0.61-0.93; p = .01) were the only other parameters that predicted disability. In men, several of the tested variables (except muscle mass measures) reported significant results.

Conclusions

Gender strongly influences which sarcopenia-related parameters predict disability. Gait speed was a powerful predictor of disability in both men and women, but its nonmuscle-specific nature should impose caution about its inclusion in definitions of sarcopenia.

SUBMITTER: Cesari M

PROVIDER: S-EPMC4375415 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature

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Publications

Sarcopenia-related parameters and incident disability in older persons: results from the "invecchiare in Chianti" study.

Cesari Matteo M Rolland Yves Y Abellan Van Kan Gabor G Bandinelli Stefania S Vellas Bruno B Ferrucci Luigi L

The journals of gerontology. Series A, Biological sciences and medical sciences 20141015 4

<h4>Background</h4>Current operational definitions of sarcopenia are based on algorithms' simultaneous considering measures of skeletal muscle mass and muscle-specific as well as global function. We hypothesize that quantitative and qualitative sarcopenia-related parameters may not be equally predictive of incident disability, thus presenting different clinical relevance.<h4>Methods</h4>Data are from 922 elder adults (mean age = 73.9 years) with no activities of daily living (ADL) impairment rec ...[more]

PMID: 25320055

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Dataset Information

Sarcopenia-related parameters and incident disability in older persons: results from the "invecchiare in Chianti" study.

Background

Methods

Results

Conclusions

Publications

Sarcopenia-related parameters and incident disability in older persons: results from the "invecchiare in Chianti" study.

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