Multiple regression analysis of demographic variables and influencing factors on fatigue (N 84) Standardized regression coefficient Standard error t P Age 0.153 1.055 1.611 .111 BMI 0.057 0.977 0.585 .560 Social support* 0.110 5.094 1.081 .283 Depression* 0.489 6.334 4.523 .000 Sleep 0.225 1.541 2.255 .027 Comorbidity 0.057 6.853 0.573 .568 Beta blocker 0.026 13.525 0.270 .788 The correction was statically significant at what level