Diabetes, basic respiratory disease and lower pre-surgical serum albumin levels were observed to be individual risk factors associated with post-operative complications, including respiratory system complications of acute respiratory failure and pulmonary infection, cardiovascular abnormalities of atrial fibrillation and arrhythmia, as well as the development of esophageal anastomotic fistulae.
Factors associated with PI were immunoglobulin G titer (hazard ratio = 4.56, 95% confidence interval = 2.31-8.95), plasma CysA concentration (3.71, 1.87-6.18), serum creatinine level (2.57, 1.31-5.82), CD4<sup>+</sup> /CD8<sup>+</sup> ratio (2.36, 1.26-6.06) and plasma albumin content (1.53, 1.05-3.25).