Effectiveness and efficiency of search methods in systematic reviews of complex evidence: audit of primary sources
TL;DR: Systematic reviews of complex evidence cannot rely solely on protocol-driven search strategies, and primary sources must be identified by “snowballing” or by personal knowledge or personal contacts.
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Abstract: Objective To describe where papers come from in a systematic review of complex evidence. Method Audit of how the 495 primary sources for the review were originally identified. Results Only 30% of sources were obtained from the protocol defined at the outset of the study (that is, from the database and hand searches). Fifty one per cent were identified by “snowballing” (such as pursuing references of references), and 24% by personal knowledge or personal contacts. Conclusion Systematic reviews of complex evidence cannot rely solely on protocol-driven search strategies.
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Storylines of research in diffusion of innovation: a meta-narrative approach to systematic review.
Trisha Greenhalgh,Glenn Robert,Fraser Macfarlane,Paul Bate,Olympia Kyriakidou,Richard Peacock +5 more
TL;DR: It is concluded that meta-narrative review adds value to the synthesis of heterogeneous bodies of literature, in which different groups of scientists have conceptualised and investigated the 'same' problem in different ways and produced seemingly contradictory findings.
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Diffusion of Innovations in Health Service Organisations: A Systematic Literature Review
Trisha Greenhalgh,Glenn Robert,Paul Bate,Fraser Macfarlane,Olivia Kyriakidou +4 more
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TL;DR: This is a systematic review on how innovations in health service practice and organisation can be disseminated and implemented using a variety of research methods.
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Literature searching for randomized controlled trials used in cochrane reviews: rapid versus exhaustive searches
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TL;DR: Analysis of sources searched in Cochrane reviews found that CCTR was the single best source of RCTs and contacting authors and manufacturers to find unpublished trials appeared to be a more effective method of obtaining the additional better quality trials.