In this month's Talk Evidence, Helen Macdonald, The BMJ's research integrity editor, is joined again by Juan Franco, editor in chief of BMJ EBM, and Joe Ross, US research editor.

They're straying beyond the pages of The BMJ, and discussing an NEJM paper about colonoscopy for colorectal cancer screening.

We have a listener request, asking about evidence for England's " NHS Diabetes Prevention Programme" - what do we know about how lifestyle interventions work at a population level? Juan puts on his Cochrane hat to answer the query.

We stay with diabetes, and Joe tells us about his research trying to see if routinely collected observational data could be used to match the outcomes of an RCT into drug treatments.

Finally, Helen updates us about what she's been doing about a case of plagiarism in one of BMJ's journals - and what that means for researchers who are writing in multiple journals about their work.

Reading list

Effect of Colonoscopy Screening on Risks of Colorectal Cancer and Related Death
https://www.nejm.org/doi/full/10.1056/NEJMoa2208375

Emulating the GRADE trial using real world data: retrospective comparative effectiveness study
https://www.bmj.com/content/379/bmj-2022-070717

Expression of concern about content of which Dr Paul McCrory is a single author
https://bjsm.bmj.com/content/early/2022/10/11/bjsports-2022-106408eoc