We found that age (> 74 years) [odds ratio (OR) 1.044, confidence interval (CI) 1.005-1.084, P = 0.025], past cerebral stroke (OR 2.643, CI 1.215-5.751, P = 0.014), Parkinson’s disease (OR 2.998, CI 1.127-7.980, P = 0.028), serum albumin level (< 40.5 g/L) (OR 6.407, CI 3.611-11.366, P < 0.001), and hemoglobin level (< 105 g/L) (OR 4.629, CI 2.721-7.877, P < 0.001) were independent risk factors for malnutrition in older patients hospitalized with CAP (Table 4). This evidence concerns the gene ALB and Parkinson disease.