<qa>  What is the purpose of LCOF?5. Analysis: analyses of covariance on intention-to-treat basis Last Observation Carried Forward LCOFwill be used to determine the effects of community OT on the daily performance of older patients with dementia and the sense of competence of their primary caregivers. Also secondary patientsand caregivers health outcomes will be analyzed by analyses of covariance on intention-to-treat basis. 