Developing attributes and Attribute-Levels for subacromial pain syndrome: A systematic review and qualitative study

Abstract Background Subacromial pain syndrome (SAPS), the most common cause of shoulder pain, can be treated through different treatments with similar effects. Therefore, in terms of deciding on the right treatment fit, patient preferences need to be understood. We aimed to identify treatment characteristics that delineate interventions (attributes) and corresponding sets of specific categorical range (attribute-levels) for SAPS. Methods This multiple method study systematically reviewed both qualitative and quantitative studies on patient preferences for treatment of SAPS, which informed semi-structured interviews with 9 clinicians and 14 patients. The qualitative data from the interviews was analyzed using the framework analysis formulated by Ritchie and Spencer. Attributes and attribute levels of the systematic review and interviews were summarized and categorized. Results The search resulted in 2607 studies, 16 of which met the eligibility criteria. The review identified 120 potential attributes, which were synthesized into 25 potential attributes. Fourteen new potential attributes were identified through the interviews, equaling a total of 39 attributes across 11 categories. Levels for 37 attributes were identified through systematic review and interviews, we were unable to identify levels for 2 attributes. Conclusions This study identified attributes and attribute levels for the treatment of SAPS. There was a discrepancy in the frequency of the represented attributes between the literature and interviews. This study may improve the understanding of patient preferences for the treatment of SAPS and help individualize care. Our study informs a future discrete choice experiment and supports shared decision-making in clinical practice.