Table 5.

Assignment of independent variables in multiple linear regression

Variables	Assignment
X1: Age	Continuous variable
X2: Gender	Male = 1, Female = 0
X3: Cough	Yes = 1, No = 0
X4: Short of breath	Yes = 1, No = 0
X5: Administrate category of clearing heat and drying dampness and removing toxin	Yes = 1, No = 0
X6: Administrate category of aromatic herbs resolving dampness	Yes = 1, No = 0
X7: Administrate category of ISRD	Yes = 1, No = 0
X8: Administrate other CMs	Yes = 1, No = 0