OBJECTIVES: To determine whether humour therapy reduces depression (primary outcome), agitation and behavioural disturbances and improves social engagement and quality-of-life in nursing home residents. DESIGN: The Sydney Multisite Intervention of LaughterBosses and ElderClowns study was a single-blind cluster randomised controlled trial of humour therapy. SETTING: 35 Sydney nursing homes. PARTICIPANTS: All eligible residents within geographically […]