Walter A. Rocca, M.D., M.P.H., of the Mayo Clinic, Rochester, Minn., and colleagues examined the incidence of dementia with Lewy bodies (DLB) and Parkinson disease dementia (PDD) in a study of residents in Olmsted County, Minn., over a 15-year period.
Limited information is available about the incidence of DLB or PDD in the general population so researchers used a well-defined population to help better characterize the two disorders, according to the study background.