Fig. 2

Correlations between the ∆Chalder FS score and ∆TNF-α (a), ∆HF (b), and ∆TAS-20 scores (c); each trend line indicates a linear relation between two respective variables. The normal P-P plot of the standardized residuals of the multiple regression analysis (d): ∆Chalder FS score as the dependent variable, ∆TNF-α, ∆HF, and ∆TAS-20 as the independent variables. This indicates that the residuals are normally distributed, and there are no outliers or influential points