KMID : 1140920230470040307
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Annals of Rehabilitation Medicine 2023 Volume.47 No. 4 p.307 ~ p.314
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Association of Diaphragm Thickness and Respiratory Muscle Strength With Indices of Sarcopenia
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Lee Yoo-Kyung
Son Sun-Han Kim Don-Kyu Park Myung-Woo
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Abstract
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Objective : To evaluate the relationship between respiratory muscle strength, diaphragm thickness (DT), and indices of sarcopenia.
Methods : This study included 45 healthy elderly volunteers (21 male and 24 female) aged 65 years or older. Sarcopenia indices, including hand grip strength (HGS) and appendicular skeletal muscle mass/body mass index (ASM/BMI), were measured using a hand grip dynamometer and bioimpedance analysis, respectively. Calf circumference (CC) and gait speed were also measured. Maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) were obtained using a spirometer, as a measure of respiratory muscle strength. DT was evaluated through ultrasonography. The association between indices of sarcopenia, respiratory muscle strength, and DT was evaluated using Spearman¡¯s rank correlation test, and univariate and multiple regression analysis.
Results : ASM/BMI (r=0.609, p<0.01), CC (r=0.499, p<0.01), HGS (r=0.759, p<0.01), and gait speed (r=0.319, p<0.05) were significantly correlated with DT. In the univariate linear regression analysis, MIP was significantly associated with age (p=0.003), DT (p<0.001), HGS (p=0.002), CC (p=0.013), and gait speed (p=0.026). MEP was significantly associated with sex (p=0.001), BMI (p=0.033), ASM/BMI (p=0.003), DT (p<0.001), HGS (p<0.001), CC (p=0.001) and gait speed (p=0.004). In the multiple linear regression analysis, age (p=0.001), DT (p<0.001), and ASM/BMI (p=0.008) showed significant association with MIP. DT (p<0.001) and gait speed (p=0.050) were associated with MEP.
Conclusion : Our findings suggest that respiratory muscle strength is associated with DT and indices of sarcopenia. Further prospective studies with larger sample sizes are needed to confirm these findings.
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KEYWORD
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Sarcopenia, Diaphragm, Respiratory muscles, Maximal respiratory pressures, Ultrasonography
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