The unweighted risk score for haematologic/infectious complications was equal to the sum of one point for each of the following: dependent functional status, age older than 50 years, BMI greater than 50 kg/m2, insulin-dependent diabetes, COPD, chronic steroid use, bleeding disorders, and albumin less than 3.5 g/dl (c-statistic: 0.563) (Table 2). This evidence concerns the gene ALB and chronic obstructive pulmonary disease.