In this study, SIADH was found to be associated with higher serum blood glucose (p < 0.001), alanine aminotransferase (ALT) (p < 0.05), aspartate aminotransferase (AST) (p < 0.05), lactate dehydrogenase (LDH) (p < 0.001), C-reactive protein (CRP) (p < 0.001); and reduced albumin (p < 0.001), total protein (p < 0.05), potassium (p < 0.05), and hemoglobin (p < 0.05). Here, CRP is linked to inappropriate ADH syndrome.