- Design
- Systematic review and meta-analysis of cohort studies
- Population
- 36 cohort studies of stroke patients with and without sarcopenia
- Primary outcome
- Poor functional outcome (modified Rankin Scale)
- Effect
- OR 2.43 (95% CI 1.95–3.03)
A meta-analysis of 36 cohort studies examined sarcopenia and recovery after stroke. Patients with sarcopenia had higher odds of poor functional outcome on the modified Rankin Scale (OR 2.43, 95% CI 1.95–3.03) and lower motor and cognitive scores (standardised mean differences about −0.95). The association with swallowing dysfunction was in the same direction but not significant (OR 1.45, 0.94–2.25).
The studies varied widely in how sarcopenia was diagnosed and when outcomes were measured, and there was evidence of publication bias, though correcting for it did not change the conclusions.
Sarcopenia may be a marker of frailty rather than a cause of poor recovery, and no trial here shows that treating it helps. But muscle mass and strength are easy to assess on admission and can inform rehabilitation planning and nutrition.
- Consider measuring grip strength or calf circumference in stroke patients on admission.
- Involve dietitians early for patients with low muscle mass or poor intake.
- Use sarcopenia as one input when setting rehabilitation goals and discussing prognosis.
- Evidence that treating sarcopenia improves stroke recovery is not yet available.
Why it matters
A modifiable-looking factor is being missed in stroke assessment, though whether it is truly modifiable is unproven.
Don't overread it
These are observational associations; they do not show that treating sarcopenia improves recovery.
The statistics, in plain English
An odds ratio of 2.43 means the odds of a poor outcome were about two and a half times higher. Because the studies were observational, frailer patients may simply recover worse for many reasons.
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