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NDT Advance Access published online on March 15, 2005
Nephrology Dialysis Transplantation, doi:10.1093/ndt/gfh643
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© The Author [2005]. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org
Received April 1, 2004
Accepted October 6, 2004

Original Articles

Association of age with muscle mass, fat mass and fat distribution in non-diabetic haemodialysis patients

Sakae Ohkawa 1, Mari Odamaki 1, Naoki Ikegaya 1, Ikuo Hibi 2, Kunihiko Miyaji 2, and Hiromichi Kumagai 1*

1 Department of Clinical Nutrition, School of Food and Nutritional Sciences and COE Program in the 21st Century, University of Shizuoka, Shizuoka, Japan
2 Miyaji Hospital, Shizuoka, Japan

* To whom correspondence should be addressed.
Hiromichi Kumagai, E-mail: kumagai{at}u-shizuoka-ken.ac.jp



  Abstract

Background. In the general population, aging induces changes in body composition, such as sarcopenia or a relative increase in visceral fat, but it remains unclear if similar changes occur in elderly haemodialysis (HD) patients.

Methods. Age-related changes in muscle and fat mass and fat distribution in the thigh and abdomen were cross-sectionally investigated in Japanese HD patients. The thigh muscle area (TMA), thigh intermuscular fat area (IMFA), thigh subcutaneous fat area (TSFA), abdominal muscle area (AMA), abdominal visceral fat area (AVFA) and abdominal subcutaneous fat area (ASFA) were measured by computed tomography in 134 non-diabetic patients between 21 and 82 years on HD. AMA, AVFA and ASFA were also measured in 70 age-matched controls.

Results. Muscle mass, fat mass and fat distribution differed significantly with age in both HD patients and controls, without significant differences in BMI. In both male and female HD patients, TMA and AMA showed significant negative correlations with age. All measures of subcutaneous fat--including TSFA, ASFA and the triceps skinfold thickness, were inversely associated with age in the female patients. In contrast, both IMFA and AVFA showed significant positive correlations with age in both male and female patients. The increase in the AVFA/ASFA ratio with age suggests progression of visceral fat accumulation in the elderly HD patients. Controls showed similar relationships between age and muscle mass and visceral fat accumulation.

Conclusions. We found an association between age and decrease in muscle mass as well as increase in visceral and intermuscular fat in non-diabetic HD patients. Such changes may be associated with the metabolic abnormalities and increased mortality in elderly HD patients.

Keywords: computed tomography; elderly patient; intermuscular fat; nutritional status; muscle mass; visceral fat.
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