Extent of Emphysema on HRCT Affects Loss of Fat-free Mass and Fat Mass in COPD
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概要
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Background Although muscle loss is thought to be a prognostic factor in chronic obstructive pulmonary disease (COPD), its determinants remain unclear. Aim To verify the hypothesis that fat-free mass (FFM) and fat mass (FM) are associated with the extent of emphysema in COPD patients. Patients and Methods A total of 112 stable, male current or ex-smokers with or without COPD attending a secondary care specialist COPD clinic were studied. FFM and FM were measured by bioelectrical impedance analysis. We also assessed the nutrition status, muscle strength by the handgrip test, exercise tolerance by the 6-minute walking test, airflow limitation and diffusion capacity, the extent of emphysema by high-resolution CT scan, systemic inflammation status using C-reactive protein, and a lipid-related hormone (adiponectin). Results The FFM index (FFMI), which was defined as the FFM divided by the square of the body height, was significantly correlated with age, the total number of lymphocytes, handgrip strength, distance on 6-minute walking, airflow limitation, diffusion capacity, extent of emphysema, and C-reactive protein. On multivariate analysis, the FFMI was associated with handgrip strength and inversely correlated with the extent of emphysema. The FM index (FMI) was positively correlated with pack-years, and was inversely correlated with the extent of emphysema and concentrations of adiponectin. Conclusion The extent of emphysema was correlated with skeletal muscle loss and also the FM.
著者
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yamada kouichi
Department of Cardiovascular Center, Biwakoohashi Hospital
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ISHII Takeo
Department of Geriatric Medicine, Tokyo University Hospital
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Kida Kozui
Department Of Clinical Pathology Tokyo Metropolitan Geriatric Medical Center
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Jones Rupert
Respiratory Research Unit Peninsula Medical School
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Motohashi Norihisa
Department Of Pulmonary Medicine Infection And Oncology ; The Respiratory Care Clinic Nippon Medical
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Motegi Takashi
Department Of Internal Medicine Division Of Pulmonary Medicine Infectious Diseases And Oncology Nippon Medical School Respiratory Care Clinic Nippon Medical School
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Kurosaki Hiroko
Department Of Pulmonary Medicine Infection And Oncology The Respiratory Care Clinic Nippon Medical School
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Kudoh Shoji
Department of Internal Medicine (Divisions of Pulmonary Medicine, Infectious Diseases, and Oncology), Nippon Medical School
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Kudoh Shoji
Department of Pulmonary Medicine, Infection, and Oncology, Respiratory Care Clinic, Nippon Medical School
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Ishii Takeo
Department of Pulmonary Medicine, Infection, and Oncology, Respiratory Care Clinic, Nippon Medical School
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