Table 2: Demographic data ().

Age, mean (years-old)76.2
Gender
 Male (%)118 (49)
 Female (%)121 (51)
Educational level
 No education (%)8 (3.34)
 Primary school (%)167 (69.87)
 Secondary school (%)35 (14.64)
 Bachelor degree or above (%)29 (12.13)
Comorbid conditions
 Hypertension (%)129 (53.97)
 Diabetes (%)51 (21.33)
 Hyperlipidemia (%)32 (13.38)
 Heart disease (%)2 (0.83)
 Smoking (%)37 (15.48)
 Alcohol drinking (%)38 (15.89)
 History of head injury (%)15 (6.27)
 Family history of dementia (%)37 (15.48)