期刊
JOURNAL OF NUTRITION HEALTH & AGING
卷 18, 期 5, 页码 540-546出版社
SPRINGER FRANCE
DOI: 10.1007/s12603-014-0464-x
关键词
Fat mass; fat-free mass; skeletal muscle; age and gender
资金
- Commonwealth Department of Health and Ageing
- Abbott Australasia Pty Ltd
- Alphapharm Pty Ltd
- Aventis Pharmaceutical
- AstraZeneca
- Bristol-Myers Squibb Pharmaceuticals
- Eli Lilly (Australia)
- GlaxoSmithKline
- Janssen-Cilag (Australia)
- Merck Sharp & Dohme (Australia)
- Novartis Pharmaceutical (Australia)
- Pratt Foundation
- Novo Nordisk Pharmaceutical
- Roche Diagnostics (Australia)
- Pfizer Pty Ltd
- Sanofi Synthelabo (Australia)
- Kidney Health Australia
- Menzies Research Institute
- Estate of the Late Edward Wilson
- Jack Brockhoff Foundation
- Marian FH Flack Trust
- Diabetes Australia
- Diabetes Australia (Northern Territory)
- City Health Centre Diabetic Service (Canberra)
- Royal Prince Alfred Hospital
- Queensland Health
- New South Wales Department of Health
- South Australian Department of Health
- Tasmanian Department of Health and Human Services
- Department of Health and Community Services Northern Territory
- Victorian Department of Human Services
- Health Department of Western Australia
Bioelectrical impedance (BIA) represents a simple, inexpensive and non-invasive method that is often used to assess fat-mass (FM) and fat-free mass (FFM) in large population-based cohorts. The aim of this study was to describe the reference ranges and examine the influence of age and gender on FM, FFM and skeletal muscle mass (SMM) as well as height-adjusted estimates of FM [fat mass index (FMI)], FFM [fat-free mass index (FFMI)] and SMM [SMM index (SMI)] in a national, population-based cohort of Australian adults. The analytical sample included a total of 8,582 adults aged 25-91 years of Europid origin with complete data involved in the cross-sectional 1999-2000 Australian, Diabetes, Obesity and Lifestyle (AusDiab) Study. Bioelectrical impedance analysis was used to examine components of body composition. Demographic information was derived from a household interview. For both genders, FFM, SMM and SMI decreased linearly from the age of 25 years, with the exception that in men SMI was not related to age and FFM peaked at age 38 years before declining thereafter. The relative loss from peak values to a parts per thousand yen75 years in FFM (6-8%) and SMM (11-15%) was similar between men and women. For FM and FMI, there was a curvilinear relationship with age in both genders, but peak values were detected 6-7 years later in women with a similar relative loss thereafter. For FFMI there was no change with age in men and a modest increase in women. In Australian adults there is heterogeneity in the age of onset, pattern and magnitude of changes in the different measures of muscle and fat mass derived from BIA, but overall the age-related losses were similar between men and women.
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