The Mediating Effect of Spiritual Well-Being and Quality of Life for Persons with Parkinson's Disease in Northern Taiwan

Background: Parkinson's disease (PD), a degenerative disease with irreversible motor dysfunction, impacts patients' quality of life (QoL). Spirituality can provide a sense of hope and meaning when individuals are faced with adverse life events, such as a diagnosis of PD. However, few studies have examined the relationship between spiritual well-being and QoL for persons with PD. Objective: To explore the relationships between the disease characteristics, spirituality and QoL for persons with PD, and verify the mediating effects of spirituality on the relationship. Methods: This cross-sectional study recruited patients with PD (n = 110) by convenience sampling from a neurological clinic in northern Taiwan. Variables were measured using the Spirituality Index of Well-Being Chinese version (SIWB-C) and the 39-item Parkinson's disease Quality of Life Questionnaire Chinese version (PDQ-39-C) self-report questionnaires. Descriptive analysis and linear hierarchical regression were conducted to examine the studied variables and explore the mediating effect of spiritual wellbeing. Results: Those whose scores were significantly better in PDQ-39 were younger, employed, with shorter disease duration and less severe condition with better functioning on their early stages and lower LEDD; additionally, those who had better quality of life also experienced better spiritual wellbeing than the counterparts. The regression model demonstrated spiritual self-efficacy had mediating effects between disease characteristics and QoL, explaining 69.8% of the variance (adjusted R-2 = 65.3%). Conclusion: The results can be the references for future strategies and interventions, focusing on increasing spiritual self-efficacy and reducing the impact of disease severity to improve QoL for persons with PD.