Abstract
This systematic review aimed to synthesize the evidence of the psychometric properties of self-efficacy patient-reported outcome measures (PROMs) in patients with chronic obstructive pulmonary disease (COPD). We conducted a systematic search of MEDLINE and other common databases from inception until September 2020. Studies that reported psychometric properties of self-efficacy outcome measures in COPD patients were included. We used the Consensus-Based Standards for the Selection of Health Measurement Instruments (COSMIN) 2018 guidelines for data extraction and evidence synthesis. Eighteen studies that assessed nine self-efficacy PROMs were eligible for inclusion. The assessment of structural validity indicated sufficient results rating for the Exercise Self-Regulatory Efficacy Scale and the Self-Care-Self-Efficacy Scale, and insufficient rating for the COPD Self-Efficacy Scale and the Pulmonary Rehabilitation Adaptation Index for Self-Efficacy (PRAISE). Construct validity measures displayed sufficient results rating with correlations ranging from −0.48 to − 0.71 between self-efficacy PROMs and other PROMs such as St. George’s Respiratory Questionnaire, Hospital Anxiety and Depression Scale and Chronic Respiratory Questionnaire. Internal consistency measures indicated sufficient rating for all self-efficacy PROMs with a Cronbach’s alpha range of 0.71 − 0.98. Responsiveness was assessed for the PRAISE with an overall sufficient rating (effect sizes of 0.21 − 0.37). The evidence regarding the psychometric properties of self-efficacy PROMs in COPD is variable. The PRAISE is responsive to changes in self-efficacy in COPD patients attending a pulmonary rehabilitation program. When using self-efficacy PROMs in clinical practice or research, clinicians and researchers should consider the psychometric properties and choose the appropriate outcome measure based on the purpose.
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