This study aimed to determine gait ability at hospital discharge in patients undergoing total knee arthroplasty (TKA) as an indicator of the risk of falling. Fifty-seven patients undergoing primary TKA for knee osteoarthritis participated in this study. Gait variability measured with accelerometers and physical function including knee range of motion (ROM), quadriceps strength, walking speed, and the Timed Up and Go (TUG) test were evaluated preoperatively and at discharge from the hospital (1 month before and 5 days after surgery). All patients were discharged directly home at 5 days after surgery. Knee flexion of ROM, quadriceps strength, walking speed, and the TUG test results were significantly worse at hospital discharge than preoperatively (p < 0.001). However, gait variability was not significantly different before and after TKA. This result indicated that patients following TKA surgery could walk at hospital discharge as stably as preoperatively regardless of the decrease in physical function, including knee ROM, quadriceps strength, and gait speed after surgery.
[Purpose] The purpose of this study is to evaluate the applicability of the calf
circumference as a tool for screening sarcopenia. [Subjects and Methods] One hundred
sixteen community-dwelling elderly females were enrolled. Calf circumference of the
dominant leg was measured using a plastic measuring tape. Subjects were divided into 3
groups based on body mass index (BMI); subjects with the values for BMI
<18.5 kg/m2; those with BMI 18.5 to 25.0; those with BMI
≥25.0 kg/m2. Positive predictive value and negative predictive value of
sarcopenia were calculated based on the obtained cut off values of calf circumference and
the diagnosis of sarcopenia in each group. [Results] Prevalence rate of sarcopenia was
9.4% (n=10). Cut off value of the calf circumference was 32.8 cm (sensitivity: 73.0%,
specificity: 80.0%, AUC: 0.792). Each BMI group showed high negative predictive value of
sarcopenia based on the calf circumference cut off value of 32.8 cm. [Conclusion] These
results suggested that to identify non-sarcopenia by larger calf circumference is more
reasonable and useful than to identify sarcopenia due to the smaller calf circumference
regardless of BMI.
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