P4‐287: WHITE MATTER HYPERINTENSITIES PREDICT ACTIVITIES OF DAILY LIVING MORE STRONGLY IN DEMENTIA WITH LEWY BODIES THAN IN ALZHEIMER'S DISEASE: THE SUNNYBROOK DEMENTIA STUDY. (1st July 2006) - Mirza, Saira S.; Saeed, Usman; Ramirez, Joel; Stuss, Donald T.; Black, Sandra E.; Masellis, Mario