Figure 1

Post-esophagectomy pulmonary complications. (a) PPC by the quintiles of FEV1%pred, (b) PPC by the quintiles of DLco %pred. PPCs, postoperative pulmonary complications; FEV1, forced expiratory volume in 1 s; %pred, %predicted; DLco, diffusing capacity of the lung for carbon monoxide, Q1, the lowest quintile; Q5, the top quintile.