Ratika Sharma, Kristel Alla, Daniel Pfeffer, Carla Meurk, Pauline Ford, Steve Kisely, Coral Gartner

To review the quality of current smoking cessation guidelines that include recommendations for people with severe mental illness. A systematic search of scientific databases, central government health authority websites, psychiatry peak bodies, guideline clearing houses and Google was undertaken for relevant smoking cessation guidelines. Three reviewers independently assessed guideline quality using the AGREE II (Appraisal of Guidelines for REsearch and Evaluation II) instrument. Two reviewers extracted recommendations specific to smokers with severe mental illness. Thirteen guidelines met the inclusion criteria. Seven guidelines scored ⩾60% in at least four domains. Median scores for 'Editorial independence', 'Rigour of development', 'Stakeholder Involvement' and 'Applicability' were less than 60%. The highest median scores were for 'Scope and purpose' (87%, 69-96%) and 'Clarity of presentation' (87%, 56-98%). 'Editorial independence' (33.3%, 0-86%) and 'Rigour of development' (54%, 11-92%) had the lowest median domain scores. The guidelines varied greatly in their recommendations but the majority recommended nicotine replacement therapy, bupropion or varenicline as first-line pharmacotherapy, along with behavioural support. Many guidelines did not adequately report their methods or the competing interests of the authors. Future guidelines development may benefit from more specifically addressing AGREE II criteria and the needs of smokers with severe mental illness.