“PO18 | Does Muscle Mass Matter? Appendicular Lean Mass As a Determinant of Anti-XA Activity in Elderly Patientes: B.M. Zanforlini1, V. Bernardi1, E. Campello2, E.M. Bicego1, C. Curreri1, A. Vaticano1, C. Sartori1, L. Manfron1, A. Perencin1, P. Rollo1, A. Baruffol1, L. Ruoso1, C. Simion2, C. Bulato2, P. Berto2, P. Simioni2, G. Sergi1 | 1Department of Medicine, Geriatrics Section, University of Padova; 2Haemorrhagic and Thrombotic Diseases Unit, Department of Medicine DIMED, Padova University Hospital, Padova, Italy”. 2025. Bleeding, Thrombosis and Vascular Biology 4 (s1). https://doi.org/10.4081/btvb.2025.278.