Strengths and limitations
First, compared with similar studies, the number of participants in this study is more than 700. Second, we investigated depression, anxiety, hypertension and quality of life, and analyzed the influence of their interaction on quality of life. Finally, a complex adjustment model based on the concept of social support is also used. Social support helps to explain the relationship between depression and anxiety and quality of life by regulating the model, which provides evidence for the mechanism of social support regulating depression and anxiety disorder. This study is a cross-sectional study, so we can not get the causal relationship between variables. The effect of confounding factors was not taken into account, and the conclusion may be biased. In the future, we will continue to do longitudinal research on the samples involved, and consider more factors.