Title: Use of Patient-Reported Outcomes (PROs) in Rheumatology Care: a Scoping Review. Authors: Yujia Li, Yomei Shaw, Adam Samer Chalak, Faith Marie Reger, Neda E Kortam, Dinesh Khanna Background: Patient-Reported Outcome measures (PROs) are surveys completed directly by patients, measuring their symptoms, health status, and health-related quality of life. Some believe PROs could help clinicians make better decisions, as it provides valuable information about patients that would otherwise be overlooked, such as sleeping difficulties and fatigue. Objective: The study intends to summarize what is currently known about PRO use in rheumatology care, including the frequency of use, types of measures are used, PRO’s feasibility, acceptability, and factors influencing its adoption. Methods: We performed a scoping review to give an overview of different types of articles and evidence published on PRO use in rheumatology care. Reviews of studies of PRO use in rheumatology or narrative reviews of PRO use in rheumatology were included; articles about the development of measures or assessing the psychometric properties of measures were excluded. Results: We have identified relevant articles based on our search criteria. While we are still developing the search strategy. Conclusion: The results will be used to inform research about the implementation of PRO use in rheumatology care and efforts to promote PRO use in rheumatology care.