Journal
ULTRASOUND IN MEDICINE AND BIOLOGY
Volume 45, Issue 9, Pages 2372-2380Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ultrasmedbio.2019.05.029
Keywords
Echo intensity; Muscle size; Physical function; Physical activity; Elderly individuals
Funding
- Center of Innovation Program (COI STREAM)
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- Japan Science and Technology Agency (JST)
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This study was performed to identify factors that discriminate muscle echo intensity (EI) among parameters of body composition, physical function and daily physical activity in elderly individuals. A total of 209 men and women (73.7 +/- 2.8 y) were evaluated. EI was measured on ultrasonographic axial thigh muscle images. The participants were categorized into the low, mid and high EI groups. We measured the skeletal muscle mass index (SMI) and physical functions. The high EI group exhibited a significantly lower SMI, slower 5-m walking time and shorter 6-min walking distance than the low EI group and had a shorter moderate-intensity activity time than the mid EI group. As a result of the discriminant analysis, elderly individuals were categorized into EI groups by SMI, daily activity and physical function. The data indicate that morphologic and functional parameters and the daily activity level help to discriminate higher and lower muscle EI. (C) 2019 World Federation for Ultrasound in Medicine & Biology. All rights reserved.
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