Research Title: Effects of laughter therapy on depression, cognition and sleep among the community-dwelling elderly
Aim of the research: To investigate the effects of laughter therapy on depression, cognitive function, quality of life, and sleep of the elderly in a community.
Methods: Between July and September 2007, the total study sample consisted of 109 subjects aged over 65 divided into two groups; 48 subjects in the laughter therapy group and 61 subjects in the control group. The subjects in the laughter therapy group underwent laughter therapy four times over 1 month. We compared Geriatric Depression Scale (GDS), Mini-Mental State Examination (MMSE), Short-Form Health Survey-36 (SF-36), Insomnia Severity Index (ISI) and Pittsburgh Sleep Quality Index (PSQI) between the two groups before and after laughter therapy.
Conclusion: Laughter therapy is considered to be useful, cost-effective and easily accessible intervention that has positive effects on depression, insomnia, and sleep quality in the elderly.

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