Impact of anxiety symptoms on dialysis adherence and complication rates: A longitudinal observational study

Background: Anxiety is a common psychological comorbidity in patients undergoing dialysis, yet its impact on treatment adherence and complication rates remains understudied. We designed a longitudinal observational study to investigate these relationships, based on the hypothesis that higher anxiety symptoms would be associated with increased complication rates and negatively associated with adherence to the dialysis regimen.

Aim: To investigate the relationship between anxiety symptoms, dialysis adherence, and complication rates in patients undergoing dialysis over a 24-month period.

Methods: This observational study analyzed data from 250 adult patients who underwent hemodialysis or peritoneal dialysis at three Affiliated Hospitals of Youjiang Medical University for Nationalities over a period of 24 months. Anxiety symptoms were assessed using the Hospital Anxiety and Depression Scale-Anxiety subscale at baseline and every 6 months. Dialysis adherence was evaluated through attendance records, interdialytic weight gain, and patient-reported medication adherence. We recorded complications (infections, cardiovascular events, and hospitalizations) and used mixed-effects models and survival analyses to infer associations between anxiety symptoms, adherence measures, and complication rates.

Results: Higher anxiety symptoms were significantly associated with poorer dialysis adherence, including increased missed sessions [incidence rate ratio = 1.32, 95% confidence interval (CI): 1.18-1.47, P < 0.001], greater interdialytic weight gain (β = 0.24, 95%CI: 0.15-0.33, P < 0.001), and lower medication adherence (odds ratio = 0.85, 95%CI: 0.78-0.93, P < 0.001). Patients with clinically significant anxiety (Hospital Anxiety and Depression Scale-Anxiety subscale ≥ 8) had a higher risk of complications [hazard ratio (HR) = 1.68, 95%CI: 1.32-2.14, P < 0.001], particularly infections (HR = 1.89, 95%CI: 1.41-2.53, P < 0.001) and cardiovascular events (HR = 1.57, 95%CI: 1.18-2.09, P = 0.002). The relationship between anxiety and complications was partially mediated by adherence measures.

Conclusion: Anxiety symptoms in patients undergoing dialysis are associated with poorer treatment adherence and increased complication rates. Regular screening and targeted interventions to address symptoms may improve adherence and clinical outcomes.