“…The rate of postoperative complications after pulmonary resection is between 16-17% [15,32] and 60-80% [17,33], ranging in the majority of experiences between 24 and 48% [3,[5][6][7][8][9]. Operative mortality is between 1% [32,34] and 15% [17], with a major range between 5 and 8% [3,[6][7][8][9]33,35,36], increasing to 9 and 17% in pneumonectomy [3,5,8,37]. These figures make the study of risk predicting factors mandatory.…”