Relationship Between Pain Intensity, Pain Catastrophizing, Self-efficacy in Patients With a Frozen Shoulder
Abstract Background: The evaluation of pain catastrophizing and self-efficacy is useful for predicting pain and is also associated with shoulder pain. The purposes of our study were to examine the relationship between pain catastrophizing, self-efficacy, and pain intensity in patients with a frozen shoulder.Methods: Ninety-three patients who were diagnosed with frozen shoulder were included in this study. Pain intensity (Numerical Rating Scale: NRS), pain catastrophizing (Pain Catastrophizing Scale: PCS), and self-efficacy (Pain Self-Efficacy Questionnaire: PSEQ) were measured at the first examination, and the relationship was examined using Bayesian estimation method. We developed a hypothesis model in which self-efficacy affects pain catastrophizing and pain catastrophizing affects pain intensity.Results: The path coefficients from the PSEQ score to the PCS score and from the PCS score to the NRS score were significant. The convergence of the hypothesized model was confirmed and validated (posterior prediction p-value 0.35). Conclusion: Our results suggest that self-efficacy affects pain catastrophizing, and pain catastrophizing affects pain intensity.