Age, body mass index, and function as the independent predictors of sarcopenia in axial spondyloarthritis: a cross-sectional analysis.

Sarcopenia is common in ax-SpA patients and is independently associated with older age, low BMI, and high BASFI score but not disease activity. Key Points • Despite the fact that ax-SpA patients are typically young, sarcopenia is frequently observed within this population. • Sarcopenia in ax-SpA patients has an independent association with older age, low BMI, and functional limitations (high BASFI scores). • Sarcopenia in ax-SpA patients is not associated with disease activity; however, early treatment to prevent functional limitations may prevent sarcopenia in ax-SpA patients.