Changes in the Screening Efficacy of Lower Calf Circumference, SARC-F Score, and SARC-CalF Score Following Update from AWGS 2014 to 2019 Sarcopenia Diagnostic Criteria in Community-dwelling Older Adults

[Purpose] To identify changes in the efficacy of the Asia Working Group for Sarcopenia (AWGS) screening tools and the differences between the different screening tools following the updates from the AWGS 2014 to 2019 criteria for community-dwelling older adults. [Participants and Methods] We included 139 community-dwelling older adults aged ≥65 years. We assessed the lower calf circumference, SARC-F score, SARC-CalF score, skeletal muscle mass, grip strength, and gait speed. Moreover, we investigated the sensitivity, specificity, likelihood ratios, and area under the ROC curve of the lower calf circumference, SARC-F score, and SARC-CalF score using the AWGS 2014 and 2019 criteria for sarcopenia diagnosis. [Results] The prevalences of sarcopenia were 10.8% and 12.9%, and 5.0% using the AWGS 2014 and 2019, and 2019 severe sarcopenia diagnostic criteria, respectively. Using AWGS 2014 criteria, the sensitivity and specificity of lower calf circumference, SARC-F score, and SARC-CalF score, were 86.7% and 62.1%, 13.3% and 91.9%, and 66.7% and 80.6%, respectively. Using AWGS 2019 criteria, the sensitivity and specificity of lower calf circumference, SARC-F score, and SARC-CalF score were 83.3% and 62.8%, 11.1% and 91.7%, and 66.7% and 81.8%, respectively. Using AWGS 2019 severe sarcopenia criteria, the sensitivity and specificity of lower calf circumference, SARC-F score, and SARC-CalF score were 100% and 59.8%, 14.3% and 91.7%, and 71.4% and 78.0%, respectively. [Conclusion] All screening tools used in AWGS 2014 and 2019 were similar in terms of efficacy; however, the AWGS 2019 severe sarcopenia criteria had different characteristics.