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Advanced quantitative methods in correlating sarcopenic muscle degeneration with lower extremity function biometrics and comorbidities

Advanced quantitative methods in correlating sarcopenic muscle degeneration with lower extremity function biometrics and comorbidities


Titill: Advanced quantitative methods in correlating sarcopenic muscle degeneration with lower extremity function biometrics and comorbidities
Höfundur: Edmunds, Kyle   orcid.org/0000-0002-6591-4116
Gíslason, Magnús
Sigurðsson, Sigurður
Gudnason, Vilmundur   orcid.org/0000-0001-5696-0084
Harris, Tamara
Carraro, Ugo
Gargiulo, Paolo
Útgáfa: 2018-03-07
Tungumál: Enska
Umfang: e0193241
Háskóli/Stofnun: Háskólinn í Reykjavík
Reykjavik University
Háskóli Íslands
University of Iceland
Svið: Heilbrigðisvísindasvið (HÍ)
School of Health Sciences (UI)
Deild: Institute of Biomedical and Neural Engineering (RU)
Læknadeild (HÍ)
Faculty of Medicine (UI)
Birtist í: PLoS ONE;13(3)
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0193241
Efnisorð: Biometrics; Fats; Computed axial tomography; Muscle tissue; Skeletal muscles; Muscle functions; Skewness; Connective tissue; Stoðkerfi (líffærafræði); Vöðvar; Megindlegar rannsóknir
URI: https://hdl.handle.net/20.500.11815/686

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Tilvitnun:

Edmunds, K., Gíslason, M., Sigurðsson, S., Guðnason, V., Harris, T., Carraro, U., & Gargiulo, P. (2018). Advanced quantitative methods in correlating sarcopenic muscle degeneration with lower extremity function biometrics and comorbidities. PLoS One, 13(3), e0193241. doi:10.1371/journal.pone.0193241

Útdráttur:

Sarcopenic muscular degeneration has been consistently identified as an independent risk factor for mortality in aging populations. Recent investigations have realized the quantitative potential of computed tomography (CT) image analysis to describe skeletal muscle volume and composition; however, the optimum approach to assessing these data remains debated. Current literature reports average Hounsfield unit (HU) values and/or segmented soft tissue cross-sectional areas to investigate muscle quality. However, standardized methods for CT analyses and their utility as a comorbidity index remain undefined, and no existing studies compare these methods to the assessment of entire radiodensitometric distributions. The primary aim of this study was to present a comparison of nonlinear trimodal regression analysis (NTRA) parameters of entire radiodensitometric muscle distributions against extant CT metrics and their correlation with lower extremity function (LEF) biometrics (normal/fast gait speed, timed up-and-go, and isometric leg strength) and biochemical and nutritional parameters, such as total solubilized cholesterol (SCHOL) and body mass index (BMI). Data were obtained from 3,162 subjects, aged 66–96 years, from the population-based AGES-Reykjavik Study. 1-D k-means clustering was employed to discretize each biometric and comorbidity dataset into twelve subpopulations, in accordance with Sturges’ Formula for Class Selection. Dataset linear regressions were performed against eleven NTRA distribution parameters and standard CT analyses (fat/muscle cross-sectional area and average HU value). Parameters from NTRA and CT standards were analogously assembled by age and sex. Analysis of specific NTRA parameters with standard CT results showed linear correlation coefficients greater than 0.85, but multiple regression analysis of correlative NTRA parameters yielded a correlation coefficient of 0.99 (P<0.005). These results highlight the specificities of each muscle quality metric to LEF biometrics, SCHOL, and BMI, and particularly highlight the value of the connective tissue regime in this regard.

Leyfi:

This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.

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