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Assessment of exercise tolerance should be an integral part of the follow-up of COVID-19 survivors.
We aimed in this study to investigate the correlation between the 5 Times Sit to Stand Test (5STST) and the 6-Minute Walk Test (6MWT) and to determine their place in assessing exercise tolerance and disability in COVID-19 survivors.
This was a cross-sectional study that included 201 survivors of COVID-19. All patients underwent a detailed medical questionnaire, assessment of disability by the Lawton scale, and sub-maximal exercise tolerance by 6MWT and 5STST. Our study population was divided into two groups based on the Length of Hospital Stay (LHS) (<10 or ≥10 days).
Compared with the group with a LHS < 10 days, the group with prolonged LHS (≥10 days) had a significantly greater mean value of 5STST. In contrast, the mean values of 6-minute Walk Distance (6MWD) and Minimal Oxygen Saturation (MOS) were significantly lower. A significant correlation of 5STST with Lawton score (r = -0.373; p < 0.0001) and 6MWD (r = -0.563; p < 0.0001) was also found.
Our results showed that the 5STST was correlated with the 6MWD and Lawton score. Hence, it could be proposed to assess physical capacity and disability, especially in patients who had a prolonged LHS for COVID-19.
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