Functional Muscle-Bone Incongruity Index (FKUI): A Prospective Observational Study

This is a prospective, observational, single-center study evaluating adults undergoing routine DXA assessment in a Physical Medicine and Rehabilitation outpatient clinic. The study will investigate the clinical applicability of the Functional Muscle-Bone Incongruity Index (FKUI), a composite approach based on handgrip strength, total hip bone mineral density, and lumbar-hip bone mineral density discordance. No treatment or interventional procedure will be administered as part of the study. Handgrip strength will be measured using a calibrated hand dynamometer, and DXA-derived bone mineral density values will be recorded from routine clinical assessments. The study aims to determine whether the combined evaluation of muscle function and bone health parameters may provide a more comprehensive assessment of musculoskeletal status.