24,25 dihydroxyvitamin D 1 25 hydroxyvitamin D 1 Aged 1 Article 1 Asia Working Group for Sarcopenia criteria 1 Biomarkers 1 Case-Control Studies 1 Female 1 Follow-Up Studies 1 Humans 1 Male 1 Prognosis 1 Sarcopenia 1 Vitamin D 1 Vitamins 1 aged 1 albumin blood level 1 bioavailability 1 bioavailable 25(OH)D biological marker 1 blood 1 case control study 1 classification 1 comparative study 1 controlled study 1 diagnostic test accuracy study 1 disease association 1 disease classification 1 dual energy X ray absorptiometry 1 enzyme linked immunosorbent assay 1