overweight as a protective factor in dementia incident in elderly residents of kahrizak charity foundation aged 80 and older

objectives: in this study, the relation of late-life body mass index (bmi) and waist circumference with incident dementia risk was investigatedin a group of iranian elderly peopel. methods & materials: in cross-sectional present study 107 elderly residents of the kahrizak charity foundation aged 80 and older were participated. dementia was assessed using mini-mental state examination questionnaire. body mass index (bmi) was computed by weight (kg)/ height (m2). results: in a multivariate logistic regression model, late-life overweight was indicated an independent and significant protective factor against developing dementia (odd ratio: 0.24, 95% confidence interval: 0.06-0.93), also there was no significant association between waistcircumference and risk of dementia incident. conclusion: overweight in late-life was shown as a protective factor against incident dementia risk incident.