Objective: To evaluate the reliability, construct validity, responsiveness, and interpretability of the PSEQ-10 in individuals with chronic shoulder pain.
Design: Measurement properties study.
Setting: Outpatient rehabilitation.
Participants: A total of 105 individuals with chronic shoulder pain were included.
Interventions: Not applicable.
Main outcome measures: At baseline, participants completed the PSEQ-10, CPSS, SPADI, and NPRS. After a 7- to 10-day interval, a second assessment was performed in which all participants completed the PSEQ-10 and NPRS. After eight weeks of clinical intervention, 89 individuals were reassessed using the PSEQ-10, CPSS, SPADI, NPRS, and GPE to analyze responsiveness and interpretability.
Results: The PSEQ-10 demonstrated excellent internal consistency (α = 0.89), acceptable intra-rater reliability (ICC = 0.70), a standard error of measurement (SEM) of 6.56 points, and a minimal detectable change (MDC) of 18.2 points. Moderate correlations with the CPSS (r = 0.62) and SPADI (r = -0.42) supported construct validity. The questionnaire showed an effect size of 0.98, AUC of 0.71 (95% CI: 0.578-0.853), and a minimal important change (MIC) of 1.5 points based on the GPE (AUC = 0.77; 95% CI: 0.645-0.897) and 5.5 points based on the CPSS (AUC = 0.67; 95% CI: 0.539-0.803), as well as 3.5 points with the SPADI.
Conclusions: The PSEQ-10 is a reliable and valid tool for point-in-time assessment of self-efficacy in individuals with chronic shoulder pain. Future research should investigate the stability of this construct and refine clinically meaningful change thresholds in this population.
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