“…Japanese studies have demonstrated that risk factors for inhospital mortality were age, respiratory distress, activities of daily living within 30 days before surgery, angina, weight loss of more than 10%, American Society of Anesthesiologist class greater than 3, Brinkman index of more than 400, body mass index (BMI) of more than 25 kg/m 2 , white blood cell count of more than 11,000 cells/µL, platelet count of less than 120,000/µL, prothrombin time/international normal ized ratio of more than 1.1, activated partial thromboplastin time of more than 40 seconds, and serum creatinine levels of more than 3 mg/dL. 4 Male sex, emergency surgery, COPD, bleeding disorders, and blood urea nitrogen less than 8 mg/dL were independent variables in the 30day mortality group. 4 Although age is a risk factor, current studies suggest that PD is an acceptable option for elderly patients.…”