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CG123 Common mental health disorders - National Institute for ...

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Methods used to develop this guideline● MEDLINE/MEDLINE In-Process● Psychological In<strong>for</strong>mation Database (PsycINFO).The search strategies were initially developed <strong>for</strong> MEDLINE be<strong>for</strong>e being translated<strong>for</strong> use in other databases/interfaces. Strategies were built up from a number oftrial searches, and from discussions of the results of the searches with the reviewteam/GDG, to ensure that all possible relevant search terms were covered.Reference ManagerCitations from each search were downloaded into Reference Manager (a softwareproduct <strong>for</strong> managing references and <strong>for</strong>matting bibliographies) and duplicatesremoved. Records were then screened against the inclusion criteria of the reviewsbe<strong>for</strong>e being quality appraised (see below). The unfiltered search results were savedand retained <strong>for</strong> future potential re-analysis to help keep the process both replicableand transparent.Search filtersTo aid retrieval of relevant and sound studies, filters were used to limit the searchesto systematic reviews, RCTs and observational studies. The systematic review andRCT filters are adaptations of designs constructed by the NHS Centre <strong>for</strong> Reviewsand Dissemination and the Health In<strong>for</strong>mation Research Unit of McMasterUniversity, Ontario. The observational studies filter was developed in-house. Eachfilter comprises index terms relating to the study type(s) and associated text words <strong>for</strong>the methodological description of the design(s).Date and language restrictionsSystematic database searches were initially conducted in December 2009. The search<strong>for</strong> systematic reviews was restricted to the last 10 years because older reviews wereconsidered to be less useful. Search updates were generated on a 6-monthly basis,with the final re-runs carried out in September 2010 ahead of the guideline consultation.After this point, studies were only included if they were judged to be exceptionalby the GDG (<strong>for</strong> example, if the evidence was likely to change a recommendation).Although no language restrictions were applied at the searching stage, <strong>for</strong>eignlanguage papers were not requested or reviewed unless they were of particular importanceto a clinical question. Date restrictions were applied <strong>for</strong> searches <strong>for</strong> systematicreviews and <strong>for</strong> updates of published reviews only (see Appendix 5). No date restrictionswere imposed <strong>for</strong> the remainder of the searches.Post-guideline searchingFollowing the draft guideline consultation, a search <strong>for</strong> systematic reviews on ‘predictorsof response’ was undertaken <strong>for</strong> the period from 2003 up to January 2011.Other search methodsOther search methods involved: (1) scanning the reference lists of all eligible publications(systematic reviews, stakeholder evidence and included studies) <strong>for</strong> morepublished reports and citations of unpublished research; (2) checking the tables of47

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