“…However, studies on the association between frailty, self-efficacy, mental health, and care dependence in patients with coronary heart disease after PCI are rare. Furthermore, gender (Park et al, 2020), age, body-mass index, course of disease, accompanying chronic diseases, complications occurring after surgery, the lesioned blood vessels, the degree of vascular disease (Head et al, 2018), region (Sabatine et al, 2021), and sleep quality (Zhu, Liu, et al, 2021;Zhu, Lu, et al, 2021) were also important covariates that may affect the CHD patient mortality rate. Education level, household income, and self-care agency were the influencing factors of care dependence (Li et al, 2017).…”