The investigators will investigate which patients' characteristics are associated with caregivers burden and its evolution for outpatients visiting a memory clinic, in particular how functional autonomy, behavioral and psychological symptoms as well as patients comorbidities can influence caregiver burden.

The study will be conducted among outpatients with progressive cognitive complaint followed in a Memory Clinic and their primary caregiver. The investigators hypothesis that caregivers experience a higher burden due to disease symptoms such as impairment of functional autonomy, behavioral and cognitive impairment, whatever the aetiology of the cognitive decline.

Inclusion Criteria:

• patients with a cognitive complaint, either expressed by the patient or one of their relatives,
• patients at any stage of disease (cognitive complaint, mild cognitive impairment (MCI) or dementia),
• patients living in the community,
• patients having an informal caregiver who will complete the questionnaire to assess the caregiver burden.

Exclusion Criteria:

-

The study population includes a sample of consecutive dyads of patient-caregiver consulting a neurologist or a geriatrician for a cognitive complaint between November 2011 and December 2014 at the Memory Clinic of the Hospital Charpennes, Villeurbanne, France.