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- Reasons for excluding grey literature from research and systematic reviews include1234:
- Absence of peer review for unpublished literature.
- Refereeing process not always successful in ensuring validity of published results.
- Excluding unpublished studies may compromise validity and reliability of meta-analyses.
- Published trials often show greater treatment effect than grey literature trials.
- Inclusion of grey literature may impact results in situations with few relevant studies or questionable vested interests.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Reasons for reluctance to include grey literature included the absence of peer-review of unpublished literature. It should be kept in mind, however, that the refereeing process has not always been a successful way of ensuring that published results are valid (Godlee 1999).handbook-5-1.cochrane.org/chapter_10/10_3_2_in…Removing gray literature from some meta-analyses results in 15% larger estimates of treat- ment effects, less precise effect-size estimates and more significant results.12,13,18 As a result, excluding unpublished studies may compro- mise the validity and reliability of meta-analyses and the specificity of systematic reviews.18,19,25onlinelibrary.wiley.com/doi/pdf/10.1111/jebm.12266In a recently updated Cochrane methodology review, all five studies reviewed showed that published trials showed an overall greater treatment effect than grey literature trials (Hopewell 2007b). Thus, failure to identify trials reported in conference proceedings and other grey literature might affect the results of a systematic review.handbook-5-1.cochrane.org/chapter_6/6_2_1_8_gr…Inclusion of these study types may have an impact in situations where there are few relevant studies, or where there are questionable vested interests in the published literature. We found substantial variation in whether SRs searched for dissertations; in most reviews that included dissertations, these had little impact on results.bmcmedresmethodol.biomedcentral.com/articles/1… - People also ask
Shades of Grey: Guidelines for Working with the Grey Literature …
WEBThe authors clarify the possibilities by reviewing 140 systematic reviews published in academic and practitioner outlets to answer the following three questions: (i) Why is grey literature excluded from/included in systematic reviews in MOS?
- Author: Richard J. Adams, Palie Smart, Anne Sigismund Huff
- Publish Year: 2017
See results only from onlinelibrary.wiley.comSearching for grey literature …
Searching for grey literature can be challenging despite greater access …
Significance of including grey literature search in systematic …
WEBMar 10, 2023 · The reason for performing a grey literature search is to reduce publication bias (by including data which is not peer reviewed or in an indexed database probably …
- Studies of why exclude grey literature
10.3.2 Including unpublished studies in systematic reviews
WEBReasons for reluctance to include grey literature included the absence of peer-review of unpublished literature. It should be kept in mind, however, that the refereeing process …
Grey literature: An important resource in systematic reviews
WEBGrey literature may thusly reduce publication bias, increase reviews' comprehensiveness and timeliness and foster a balanced picture of available …
Searching the Grey Literature: A Handbook for Searching Reports ...
WEBApr 1, 2019 · It details how grey literature offers value, describes how it compares with other types of information, and, in general, makes a great case for including grey …
Systematic Reviews and Meta-Analyses: Grey Literature
WEBJul 10, 2024 · Grey Literature is a broad term that varies across discipline. In very general terms, grey literature is anything other than peer-reviewed, empirical research. …
Searching and synthesising ‘grey literature’ and ‘grey information’ …
WEBSep 29, 2016 · Grey literature includes a range of documents not controlled by commercial publishing organisations. This means that grey literature can be difficult to search and …
WEBExclude grey literature from reviews supporting relatively mature and/or bounded academic conversations with the possible exception of some Tier 1 literatures that are …
Searching for grey literature for systematic reviews: challenges …
WEBDec 6, 2013 · Searching for grey literature can be challenging despite greater access through the Internet, search engines and online bibliographic databases. There are a …
Grey Literature Searching for Health Sciences Systematic …
WEBA 2007 Cochrane systematic review on the use of grey literature in meta-analyses of randomized trials found that non-grey literature trials tended to be larger and showed …
Grey Literature: Its Emerging Importance - Taylor & Francis Online
WEBJul 29, 2011 · This article seeks to explore the importance of grey literature and to outline major sources for locating grey literature in the health sciences. There are a number of …
Shades of grey: Guidelines for working with the grey literature in ...
WEBJan 1, 2016 · We clarify the possibilities by reviewing 140 systematic reviews published in academic and practitioner outlets to answer the following three questions: (i) Why is …
Grey literature in systematic reviews: a practical approach to ...
WEBBackground: There is growing recognition that grey literature can be useful in systematic reviews. Searching for grey literature can be difficult, as it is not produced for …
WEBRemoving gray literature from some meta-analyses results in 15% larger estimates of treat-ment effects, less precise effect-size estimates and more significant …
Finding studies for inclusion in systematic reviews of interventions ...
WEBThe inclusion of unpublished and grey literature is essential for minimizing the potential effects of publication bias.
Searching for grey literature for systematic reviews ... - PubMed
WEBWe provide a brief overview of grey literature before describing our search and review approach. We also discuss the benefits and challenges of including grey literature in …
Applying systematic review search methods to the grey literature: …
WEBOct 22, 2015 · Applying systematic methods to grey literature searches should improve the quality of review syntheses that include grey literature by providing a more …
Grey Literature - Evidence Synthesis and Systematic Reviews
WEBJun 11, 2024 · Here are 10 reasons why grey literature is a valuable source of information to include in your evidence synthesis review: Grey literature provides a unique global …
Systematic Reviews: Grey Literature & Handsearching
WEBJul 1, 2024 · Reasons for handsearching include: Indexing inconsistencies in bibliographic databases. Selective inclusion of articles. Difficulty of retrieving non-English articles in a …
Shades of grey: Guidelines for working with the grey literature in ...
WEBThe authors clarify the possibilities by reviewing 140 systematic reviews published in academic and practitioner outlets to answer the following three questions: (i) Why is …
Grey literature in systematic reviews: a cross-sectional study of …
WEBApr 19, 2017 · Current Cochrane guidance recommends searching in grey literature sources beyond conventional bibliographic biomedical databases (e.g., Medline or …
Gray literature: An important resource in systematic reviews
WEBAug 31, 2017 · Gray literature may thusly reduce publication bias, increase reviews’ comprehensiveness and timeliness, and foster a balanced picture of available …
Why Use Grey Literature? - Grey Literature - Duquesne University
WEBFeb 22, 2024 · Why Use Grey Literature? While evidence syntheses require close review and comprehensive perusal of the black and white literature provided in scholarly …
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