“…[9][10][11] However, it is well known that advanced age is a risk factor for mortality, and elderly patients are more likely to suffer from postoperative complications. 2,3,8,9) Bridges, et al reported from the Society of Thoracic Surgeons National Database with a total of 662033 patients that operative mortality was 11.8% for patients more than 90 years of age, 7.1% for those 80 to 89 years, and 2.8% for those 50 to 79 years and the incidence of renal failure and prolonged ventilation was highest among patients more than 90 years of age (9.2% and 12.2%), compared with those 80 to 89 years (7.7% and 10.5%) or 50 to 79 years (3.5% and 6.0%). 9) In contrast to their study, mortality in the present study was high as 12%.…”