Objectives: To study the effects of a nonpharmacologic intervention, Music and Memory (M&M), on residents with dementia and/or behavioral problems living in nursing homes (NHs).
Design: This was a prospective, mixed-methods cohort study.
Setting And Participants: In total, 4107 residents in 265 California NHs and that reported data at least twice during the 3-year study period were enrolled.