Relationship between general information and stigma
REGRESSION
The general information (age and monthly income) that was significant in the multiple linear regression analysis was described by smoothing curve fitting, where the red solid line indicates the smoothed curve fitting between the variables and the blue dashed line indicates the 95% confidence interval of the fitting. A non-linear relationship was observed between age and stigma, with different trends in stigma levels among patients of different ages but a general trend of decreasing stigma levels with increasing age (Fig. 
The relationship between age and stigma
The relationship between income and stigma