Prevalence of sarcopenia in inpatients 70 years and older using different diagnostic criteria.

The study was conducted at one university hospital, so its prevalence estimates may not apply to other inpatient populations. Fifty-seven patients were excluded from muscle mass measurements, so mass-based criteria were not applied in all included patients. Gait speed could not be measured at admission, so criteria requiring physical performance were not fully applied. Bioelectrical impedance measurements may have been affected by hydration status, which can change estimated muscle mass and fat mass. The diagnostic criteria were designed for the general population, not for inpatients, and no inpatient-specific criteria have been defined. The authors note that no healthcare professional is defined as responsible for measuring body composition and that nursing protocols have not been established. The study reports prevalence by diagnostic criteria only; it does not test whether identifying sarcopenia improves patient outcomes.

The authors report no conflicts of interest.

Do not assume the high prevalence figures mean a valid inpatient sarcopenia diagnosis; they came from a single muscle-strength criterion, not a validated inpatient diagnosis. The study did not test treatment or outcomes.