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Negative linear correlation between basal FEV1 value and percentage change of FEV1 during PPR (A) and negative linear correlation between basal 6MWD and percentage increase of 6MWD during PPR (B)
FEV1 – forced expiratory volume in the 1 s, 6MWD – 6-minute walking distance, PPR – preoperative pulmonary rehabilitation. Dotted lines represent mean values with 95% confidence interval
