RESULTS	Before laughter therapy , the GDS scores were 7.98 3.58 and 8.08 3.96 ; the MMSE scores were 23.81 3.90 and 22.74 4.00 ; total scores of SF-36 were 54.77 17.63 and 52.54 21.31 ; the ISI scores were 8.00 6.29 and 8.36 6.38 ; the PSQI scores were 6.98 3.41 and 7.38 3.70 in laughter therapy group and control groups , respectively .\