“…A large number of studies have shown that the correlation between subjective social class and depression is related through a variety of psychological effects. They are mainly reflected in the following aspects: well-being (e.g., subjective well-being and health assessment) [ 22 ], life satisfaction [ 55 ], security (e.g., self-esteem and control [ 56 ], response to threats, and cognitive function [ 57 , 58 ]), sense of fairness (e.g., sense of class discrimination and stigma [ 59 ], emotion, and justice perception) [ 60 ], sense of acquisition (e.g., cultural expression and practice model [ 61 ], expected educational level [ 62 ], medical expenditures [ 63 ]), social trust (e.g., social adaptation and interpersonal trust [ 21 ]), social support (e.g., social connection [ 64 ], social support and sense of control [ 65 ], social relationship quality [ 66 ], etc.). Our results also show that people with lower subjective social class have more severe depression, which means subjective social class is significantly associated with depression.…”