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[Correspondence] Can Shoulder Arthroscopy Work? (CSAW) trial – Authors’ reply

We thank Sawalha and Waseem, and Wang and colleagues for their comments about our study.1 Patient selection criteria were applied as universally as possible for a pragmatic surgical trial. Variation in the numbers recruited by site does not per se indicate that there was variation in patient selection, with many factors, such as available research time and support, surgical list size, site policies, and set-up all contributing to the resultant recruitment numbers. Some minor variation in patient selection between surgeons is inevitable but also reflective of clinical practice.