Use of Atypical Antipsychotics in patients with dementia Lead Investigator: Ismaeel Yunusa Institution : MCPHS University E-Mail : iyunu1@stu.mcphs.edu Proposal ID : 1084 Proposal Description: To characterize the current use of atypical antipsychotics in patients diagnosed with dementia for the treatment of behavioral and psychological symptoms in terms of heath and cost outcomes Build a multi-state model and estimate transition probabilities across different health states (according to CDR) of mild AD, moderate AD, severe AD and death.