Comparison of Means between two groups group a Groupb Methods statistic P n(missing) 72(0) 70(0) age mean (std) 40.11* 14.87 37.26±14.45 t- test 1.1600.2482 Median 41.00 36.00 (Min-Max)(17-65) (17-67) Duria mean(std) 23.74+70.35 22.4170.75 rank sun0.1120.9113 tion median 5.00 4.00 (1-365) (Min-Max)(1 )(1-365) 2021/1/262021/1/26 6 Comparison of Means between two groups Group A Group B Methods statistic P N (missing) 72( 0) 70( 0) age mean(std) 40.11± 14.87 37.26± 14.45 t- test 1.160 0.2482 Median (Min-Max） 41.00 (17- 65） 36.00 （17-67） Duria mean(std) 23.74± 70.35 22.41± 70.75 rank sum 0.112 0.9113 tion Median (Min-Max） 5.00 (1-365） 4.00 (1-365）