Reliability of the Brazilian Portuguese version of the Neuropsychiatric Inventory (NPI) for patients with Alzheimer's disease and their caregivers

Abstract
Background: Behavioral symptoms and caregivers' responses may differ among various ethnic and cultural groups. Therefore it is important to have a reliable instrument to assess behavioral disturbances of dementia in various cultures. The Neuropsychiatric Inventory (NPI) has been widely used in many countries. To date there has been no reliability study of this instrument in Brazil.