Hierarchical regression analysis
As shown in Table 8 and Table 9, age and monthly income (RMB) were added in the first step. In the second block, depression, anxiety and perceived social support (PSS) were added respectively. Finally, the PSS&Depression interaction term and the PSS&Anxiety interaction term were added in the last block respectively. The PSS&Depression interaction term was negatively correlated with quality of life (β=-0.241, p <0.01), and explained an extra 5.7% of the variance (F=68.649, adjusted R2=0.369, ΔR2=0.050, p <0.01). The PSS&Anxiety interaction term was negatively correlated with quality of life (β=-0.235, p <0.01), and explained an extra 5.6% of the variance (F=65.813, adjusted R2=0.359, ΔR2=0.048, p <0.01).