As shown in Table 2, lower serum albumin level, ex- and current smoker, a history of congestive heart failure and COPD, and the use of atypical antipsychotic drugs (adjusted OR = 2.26, 95% CI = 1.23 - 4.15), inhaled corticosteroids (adjusted OR = 2.89, 95% CI = 1.56 - 5.35), and prescribed antibiotic(s) prior to admission (adjusted OR = 1.81, 95% CI = 1.09 - 3.02) was significantly associated with an increased risk for CAP after adjusting for the potential confounders as listed in the table 2. This evidence concerns the gene ALB and chronic obstructive pulmonary disease.