Back to Search
Start Over
Evaluation of appendicular lean mass using bio impedance in persons aged 80+
- Publication Year :
- 2019
- Publisher :
- Churchill Livingstone, 2019.
-
Abstract
- Summary Background To date, the accuracy of bio-impedance (BIA) to assess body composition & sarcopenia in persons aged 80 and over remains unclear. Objective We aimed to evaluate the agreement between dual energy X-ray absorptiometry (DXA) and BIA equations to determine lean mass, as well as their suitability to identify sarcopenia. Design 174 community dwelling well-functioning persons (83 women, 91 men) aged 80 and over were included. Appendicular lean mass (ALM) was predicted using BIA-based equations available in literature, and compared to DXA outcomes. Through cross-validation and stepwise multiple linear regression, a new ALM-formula was generated suitable for this population. Results Literature-based BIA equations systematically overestimated ALM. The new prediction formula that we propose for the 80+ is: ALM = 0,827+(0,19*Impedance Index)+(2,101*Sex)+(0,079*Weight); R2 = 0,888; SEE = 1,450 kg. Sarcopenia classification based on our new BIA equation for ALM showed better agreement with DXA (k ≥ 0,454) compared to literature-based BIA equations (k Conclusions Despite the high correlation between both methods, literature-based BIA equations consistently overestimate ALM compared to DXA in persons aged 80 and over. We proposed a new equation for ALM, reaching higher agreement with DXA and thus improving the accuracy of BIA for this specific age group.
- Subjects :
- Male
0301 basic medicine
Sarcopenia
Population
030209 endocrinology & metabolism
Critical Care and Intensive Care Medicine
03 medical and health sciences
Absorptiometry, Photon
0302 clinical medicine
Linear regression
Statistics
Electric Impedance
medicine
Humans
bioelectrical impedance analysis
Sarcopenic obesity
education
Aged, 80 and over
education.field_of_study
030109 nutrition & dietetics
Nutrition and Dietetics
Dual energy
business.industry
Bio impedance
Reproducibility of Results
medicine.disease
Dual X-ray absorptiometry
Aged 80 and over
Lean body mass
Body Composition
Female
business
Bioelectrical impedance analysis
Algorithms
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....6af0044f49275a4a450bd10d5a54ecb8