Is the degree of cognitive impairment in patients with Alzheimer's disease related to their capacity to appoint an enduring power of attorney?

Background: Clinicians are often asked to retrospectively assess a patient's capacity to create an Enduring Power of Attorney (EPA). This study will investigate if capacity to create an EPA is significantly related to the degree of cognitive impairment in Alzheimer patients, and whether Mini Mental State Examination score (MMSE) is a good predictor of a patient's capacity. It also considers if socio-demographic factors are related to a patient's capacity to create an EPA.