ALB and Hypercholesterolemia: Age, sex, Charlson comorbidity index, cognitive function, mood and depressive symptoms, educational years, BMI, blood cell count and biochemistry (fasting blood sugar, total hypercholesterolaemia, albumin, total protein, uric acid, serum creatinine, Hs‐CRP, urine analysis and dual‐energy X‐ray absorptiometry)