RT Journal Article SR Electronic T1 Manuscript review continuing medical education: a retrospective investigation of the learning outcomes from this peer reviewer benefit JF BMJ Open JO BMJ Open FD British Medical Journal Publishing Group SP e039687 DO 10.1136/bmjopen-2020-039687 VO 10 IS 11 A1 Steven Kawczak A1 Sultana Mustafa YR 2020 UL http://bmjopen.bmj.com/content/10/11/e039687.abstract AB Objectives This study investigates the learning outcomes for peer reviewers participating in a manuscript review continuing medical education (CME) process. CME from serving as a peer reviewer is one of the many benefits of serving as a reviewer.Design This is a descriptive study retrospectively analysing learning outcomes self-reported by peer reviewers from 2013 to 2017 using a CME assessment framework.Setting, participants and primary outcome measures Participant data are from 1985 peer reviewers who completed 2413 manuscript reviews over 32 medical journals from 2013 to 2017 and completed the CME process after their prepublication manuscript review. 417 reviewer responses were practice behaviour change(s) that were studied in depth using an assessment framework on changes in knowledge, competence and performance.Results The results show positive learning outcomes reported by reviewers at the knowledge, competence and performance behaviour levels as a result of reviewing manuscripts. Higher levels of learning outcomes are more frequently achieved when reviewers consult multiple sources when conducting reviews. Reviewer demographics, such as gender or years of experience, did not have a significant association to learning outcomes.Conclusions Manuscript Review CME is an effective way that learning within the peer reviewer process can occur and helps reviewers gain knowledge, improve competence and make changes to their professional practice at all stages of their careers. Journal publishers should emphasise and support reviewers through offering CME to reviewers and encourage consultation of multiple sources when conducting reviews, which is an added benefit and resource to help professionals continue their development.