Summary
This prospective cohort study of 46 mechanically ventilated COVID-19 survivors found that physical disability was common at 3 months post-discharge, with 48% showing impaired walking distance. Reduced lung diffusing capacity and increased intermuscular adipose tissue—markers of poor muscle quality—were independently associated with physical performance, suggesting that both pulmonary function and skeletal muscle composition are key determinants of functional recovery after severe COVID-19.
UK applicability
The findings are directly applicable to UK ICU survivors of severe COVID-19, as they establish prognostic markers for functional recovery that could inform rehabilitation strategies in National Health Service settings. The association between muscle quality and disability may support targeted nutritional or physical therapy interventions in post-COVID recovery programmes.
Key measures
6-minute walking distance (primary functional outcome), Medical Research Council sum score, handgrip strength, pulmonary function tests (lung diffusing capacity), intermuscular adipose tissue area (CT imaging), patient-reported outcome measures
Outcomes reported
The study measured physical performance (6-minute walking distance), muscle strength (Medical Research Council sum score and handgrip strength), pulmonary function, and skeletal muscle architecture in mechanically ventilated COVID-19 survivors at 3 months post-discharge. Patient-reported outcomes and the association between muscle quality and functional disability were also assessed.
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