RESULTS	After laughter therapy , the GDS scores were 6.94 3.19 ( P = 0.027 ) and 8.43 3.44 ( P = 0.422 ) ; the MMSE scores were 24.63 3.53 ( P = 0.168 ) and 23.70 3.85 ( P = 0.068 ) ; total scores of SF-36 were 52.24 17.63 ( P = 0.347 ) and 50.32 19.66 ( P = 0.392 ) ; the ISI scores were 7.58 5.38 ( P = 0.327 ) and 9.31 6.35 ( P = 0.019 ) ; the PSQI scores were 6.04 2.35 ( P = 0.019 ) and 7.30 3.74 ( P = 0.847 ) in both groups , respectively .\