{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T02:18:45Z","timestamp":1774837125827,"version":"3.50.1"},"reference-count":36,"publisher":"The Korean Geriatrics Society","issue":"1","license":[{"start":{"date-parts":[[2025,11,3]],"date-time":"2025-11-03T00:00:00Z","timestamp":1762128000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["e-agmr.org"],"crossmark-restriction":true},"short-container-title":["Ann Geriatr Med Res"],"published-print":{"date-parts":[[2026,3,31]]},"abstract":"<jats:p>Background: Older patients visiting the emergency department (ED) are at increased risk of adverse outcomes, including ED revisits and mortality. Sarcopenia quantification by point-of-care ultrasound (POCUS) may be a useful bedside screening tool, especially when traditional frailty screening instruments, reliant on history taking, cannot be used. This study evaluated whether POCUS measurement of rectus femoris cross-sectional area (RFcsa) can predict adverse outcomes in older patients visiting the ED.Methods: In this single-centre prospective study, patients aged \u226570 years presenting to the ED of a Dutch university hospital and enrolled in the Acutelines data and biobank were included. RFcsa was measured using POCUS. ROC-analysis assessed the overall accuracy of RFcsa for prediction of the primary outcome, which was defined as the composite of ED revisit or death within 3 months. Logistic regression determined the added value of RFcsa to Karnofsky Performance Score (KPS).Results: During the study period, a total of 68 patients were included. Twenty-six patients (38%) met the primary endpoint. RFcsa showed excellent intra-rater reliability (interclass correlation coefficient=0.98). However, the accuracy to predict the composite endpoint was low, with an area under the curves of 0.53 (0.39\u20130.66) for unadjusted RFcsa and 0.51 (0.36\u20130.66) for sex-adjusted RFcsa. The addition of RFcsa in a multivariate logistic regression model with KPS did not increase the overall explained variance in the primary endpoint.Conclusion: In older patients presenting in the ED, POCUS-measured RFcsa does not predict ED revisits or death within 3 months. 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