Background
Given the importance of exercise self-efficacy in the process of quality of life change, this study aimed to describe the relationship between exercise self-efficacy and health-related quality of life (HRQOL) in dialysis patients.
Methods
A cross-sectional study was conducted in Shanghai, China. Structured questionnaires applied to the patients collected basic information about gender, age, marital status, education, and income for socio-demographic and body mass index, causes for end-stage renal disease, dialysis modality, and dialysis vintage for the disease-related factors. Physical activity was assessed by a self-administered questionnaire. Exercise self-efficacy was measured through the Exercise Self-Efficacy Scale (ESES). Health-related quality of life was evaluated by the Kidney Disease Quality of Life Instrument-Short Form version 1.3 (KDQOL-SF™ v1.3). Data were analyzed using a univariate generalized linear model, Spearman correlation, and hierarchical multiple regression.
Results
A positive association was observed between exercise self-efficacy and HRQOL (r = 0.310, P < 0.001). Physical activity as predictor variables explained 9.8% of the variance in overall HRQOL (P < 0.001). Exercise self-efficacy explained an additional 7.1% of the HRQOL variance. In total, 24.6% of the variation in the HRQOL is explained by the socio-demographic variables, disease-related factors, physical activity, and exercise self-efficacy.
Conclusion
Overall, only 16.9% of the change in HRQOL was explained by physical activity and exercise self-efficacy. Future research is still needed to explore further the factors influencing the quality of life in dialysis patients. However, this finding suggests the need to consider the importance of HRQOL and physical activity as well as exercise self-efficacy when developing intervention programs.