Providing comments and feedback to peer reviewers should improve the quality of peer review reports over time. Feedback is particularly valuable to new peer reviewers and may be an incentive to continue the relationship with Cochrane. You might consider implementing a mentoring system, whereby experienced consumer peer reviewers give support to new consumer peer reviewers.
Upon request, CRGs or the DTA Editorial Team should provide peer reviewers with a copy of the authors’ responses to their peer-review comments (note that all post-publication peer review comments will receive a response). There is a custom task in workflows to send feedback/thanks to peer reviewers and advisors.