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|Title:||Lifestyle factors associated with age-related differences in body composition: the Florey Adelaide Male Aging Study|
|Citation:||American Journal of Clinical Nutrition, 2008; 88(1):95-104|
|Publisher:||Amer Soc Clinical Nutrition|
|Evan Atlantis, Sean A. Martin, Matthew T. Haren, Anne W. Taylor, and Gary A. Wittert for the Florey Adelaide Male Aging Study|
|Abstract:||BACKGROUND: Age-related change in body composition is associated with adverse health outcomes, including functional decline, disability, morbidity, and early mortality. Prevention of age-related changes requires a greater understanding of the associations among age, lifestyle factors, and body composition. OBJECTIVE: We aimed to comprehensively determine lifestyle factors associated with age-related differences in body composition assessed by using dual-energy X-ray absorptiometry. DESIGN: We analyzed baseline (cross-sectional) data collected from 2002 to 2005 for approximately 1200 men in the Florey Adelaide Male Aging Study, a regionally representative cohort of Australian men aged 35-81 y. RESULTS: Mean values for whole-body lean mass (LM) and areal bone mineral density (aBMD) decreased, whereas mean values for abdominal fat mass (FM) and whole-body and abdominal percentage FM (%FM) increased with age. No significant age-related differences were found for whole-body FM. Multiple adjusted odds of being in the highest tertiles for whole-body and abdominal %FM decreased for smokers (63-71%) but increased with age group and for lowest energy (43-50%), carbohydrate (92-107%), and fiber (107%) intake tertiles. Multiple adjusted odds of being in the highest aBMD tertile decreased for lowest body mass (92%) and carbohydrate intake (63%) tertiles and for men aged > or = 75 y (78%) but increased for Australian birth (58%) and for participation in vigorous physical activities (82%). CONCLUSIONS: Age-related differences in body composition indicate that whole-body FM remains stable but increases viscerally and that whole-body %FM is confounded by LM, whereas aBMD decreases with age. Age-related differences in %FM and aBMD are associated with demographic and lifestyle factors.|
|Keywords:||Florey Adelaide Male Aging Study; Muscle, Skeletal; Adipose Tissue; Humans; Absorptiometry, Photon; Diet; Odds Ratio; Cohort Studies; Cross-Sectional Studies; Smoking; Life Style; Demography; Body Composition; Aging; Bone Density; Adult; Aged; Aged, 80 and over; Middle Aged; Australia; Male|
|Description:||© 2008 American Society for Nutrition|
|Appears in Collections:||Medicine publications|
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