Association Between Pain Self-Efficacy and Adherence to Hemodialysis Regimen

Background/Objectives: Pain is a common symptom in patients undergoing hemodialysis (HD) and may influence their quality of life. Pain self-efficacy may play an important role in self-management and adherence behaviors. This study aimed to examine the association between pain self-efficacy and adherence to the HD regimen in patients undergoing HD. Methods: In this descriptive and cross-sectional study, 199 patients undergoing HD from a single private hospital (convenience sample) in Athens, Greece, completed the Greek-Simplified Adherence Questionnaire-HD (GR-SMAQ-HD) to assess adherence and the Pain Self-efficacy Questionnaire (PSEQ) to assess pain self-efficacy. Sociodemographic and clinical data were also recorded. Bivariate analyses and multiple linear regression were performed to identify factors associated with adherence. Statistical significance was set at p < 0.05. Results: Patients demonstrated moderate levels of pain self-efficacy (mean PSEQ = 33.96 ± 9.74) and moderate adherence to the HD regimen (mean GR-SMAQ-HD = 4.78 ± 2.54). No significant correlation was found between pain self-efficacy and adherence in bivariate analysis (rho = 0.125, p = 0.221). However, in multivariate analysis, pain self-efficacy was a significant independent predictor of adherence (β = 0.056, p = 0.032). Longer duration of End-Stage Renal Disease (ESRD) (β = −0.158, p < 0.001), higher pill burden (rho = −0.237, p = 0.030) were associated with lower adherence. Marital status was also a significant predictor of adherence (β = 1.631, p = 0.016). The model explained 24% of the variance in adherence (Adjusted R2 = 0.24). Conclusions: Pain self-efficacy may indirectly affect adherence to the HD regimen, although its direct effect is modest. Adherence appears to be negatively influenced by pill burden and ESRD duration, while social support may play an important role.