Prevalence and Associated Factors of Depressive Symptoms among Chronic Kidney Disease Patients in China: Results from the Chinese Cohort Study of Chronic Kidney Disease (C-STRIDE).

Objective: Depression is the most common mental disorder in patients with chronic kidney disease (CKD), and previous studies have found that: (a) depression can accelerate the progression of CKD; and (b) depression is an independent risk factor for hospitalization and death among patients with CKD. Therefore, the objective of the current study was to investigate the prevalence of depression in Chinese patients with CKD, and to identify variables associated with depression. Methods: The study analyzed baseline data from a multicenter prospective cohort study of Chinese patients with chronic kidney disease (the C-STRIDE study). In all, 2995 participants in CKD stages 1 to 4 who completed a survey of depressive symptoms were included in the analyses. Depressive symptoms were assessed by the Zung Self-Rating Depression Scale (ZSDS). A ZSDS 50 was used as the cut-off score for the presence of depressive symptoms. Multivariable logistic regression was used to identify variables associated with depression. Results: The mean estimated glomerular filtration rate (eGFR) in the study sample was 51.59 29.49 ml/min/1.73 m(2). The prevalence of depressive symptoms was 37.8% and increased significantly with CKD stage. Being female, a higher level of education, a low income, a larger economic impact of disease cost, comorbid cardiovascular disease, anemia, and impaired physical ability were independently associated with depressive symptoms. Conclusion: Our study revealed that depressive symptoms were common among patients with CKD in China. Sociodemographic variables and the clinical characteristics of disease severity were strongly associated with depressive symptoms.