Cost-utility Analysis of the Use of the Paro Robotic Seal by Elderly Patients With Moderate or Severe Cognitive Disorders in Institutions: a Randomised Study.

Inclusion Criteria: * Patients over 70 years of age * With moderate or severe neurocognitive disorders of any etiology (Mini Mental State Examination (MMSE) less than or equal to 20, or not feasible) * Resident in EHPAD (establishment for dependent elderly people) or USLD (long-term care unit ) in permanent accommodation for more than 1 month at inclusion Exclusion Criteria: * Patient with presumed life expectancy of less than 3 months * Mini Mental State Examination (MMSE) not feasible for any reason other than cognitive impairment (e.g. stroke aphasia), without dementia * Known carrier of multi-drug resistant bacteria * Carrier of Pace-maker (precautionary advice from manufacturer) * Refusal to participate to the study (trusted person, guardian or curator or patient depending on the patient's mental state) * Patient under court protection * Prior inclusion in an interventional study that may alter the interpretation of the results of the analysis * Patient not affiliated to a social security system or beneficiary of such a system