Epidemiology and Reporting Characteristics of Systematic Reviews
Publication Date
March 27, 2007
Journal
PLOS Medicine
Authors
David Moher, Jennifer Tetzlaff, Andrea C Tricco, Margaret Sampson, et al
Volume
4
Issue
3
Pages
e78
DOI
https://dx.plos.org/10.1371/journal.pmed.0040078
Publisher URL
http://journals.plos.org/plosmedicine/article?id=10.1371%2Fjournal.pmed.0040078
PubMed
http://www.ncbi.nlm.nih.gov/pubmed/17388659
PubMed Central
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1831728
Europe PMC
http://europepmc.org/abstract/MED/17388659
Web of Science
000245243700012
Scopus
33947684405
Mendeley
http://www.mendeley.com/research/epidemiology-reporting-characteristics-systematic-reviews
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CiteULike | Further Information

Mendeley | Further Information

{"title"=>"Epidemiology and reporting characteristics of systematic reviews", "type"=>"generic", "authors"=>[{"first_name"=>"David", "last_name"=>"Moher", "scopus_author_id"=>"7005443800"}, {"first_name"=>"Jennifer", "last_name"=>"Tetzlaff", "scopus_author_id"=>"16069577300"}, {"first_name"=>"Andrea C.", "last_name"=>"Tricco", "scopus_author_id"=>"8887040800"}, {"first_name"=>"Margaret", "last_name"=>"Sampson", "scopus_author_id"=>"9746766000"}, {"first_name"=>"Douglas G.", "last_name"=>"Altman", "scopus_author_id"=>"55612875500"}], "year"=>2007, "source"=>"PLoS Medicine", "identifiers"=>{"pmid"=>"17388659", "issn"=>"15491277", "sgr"=>"33947684405", "pui"=>"46495312", "scopus"=>"2-s2.0-33947684405", "isbn"=>"1549-1277", "doi"=>"10.1371/journal.pmed.0040078"}, "id"=>"6e51c966-c1e6-3c20-a400-1366b79ca6fb", "abstract"=>"Background Systematic reviews (SRs) have become increasingly popular to a wide range of stakeholders. We set out to capture a representative cross-sectional sample of published SRs and examine them in terms of a broad range of epidemiological, descriptive, and reporting characteristics, including emerging aspects not previously examined. Methods and Findings We searched Medline for SRs indexed during November 2004 and written in English. Citations were screened and those meeting our inclusion criteria were retained. Data were collected using a 51-item data collection form designed to assess the epidemiological and reporting details and the bias-related aspects of the reviews. The data were analyzed descriptively. In total 300 SRs were identified, suggesting a current annual publication rate of about 2,500, involving more than 33,700 separate studies including one-third of a million participants. The majority (272 [90.7%]) of SRs were reported in specialty journals. Most reviews (213 [71.0%]) were categorized as therapeutic, and included a median of 16 studies involving 1,112 participants. Funding sources were not reported in more than one-third (122 [40.7%]) of the reviews. Reviews typically searched a median of three electronic databases and two other sources, although only about two-thirds (208 [69.3%]) of them reported the years searched. Most (197/295 [66.8%]) reviews reported information about quality assessment, while few (68/ 294 [23.1%]) reported assessing for publication bias. A little over half (161/300 [53.7%]) of the SRs reported combining their results statistically, of which most (147/161 [91.3%]) assessed for consistency across studies. Few (53 [17.7%]) SRs reported being updates of previously completed reviews. No review had a registration number. Only half (150 [50.0%]) of the reviews used the term ‘‘systematic review’’ or ‘‘meta-analysis’’ in the title or abstract. There were large differences between Cochrane reviews and non-Cochrane reviews in the quality of reporting several characteristics. Conclusions SRs are now produced in large numbers, and our data suggest that the quality of their reporting is inconsistent. This situation might be improved if more widely agreed upon evidence-based reporting guidelines were endorsed and adhered to by authors and journals. These results substantiate the view that readers should not accept SRs uncritically.", "link"=>"http://www.mendeley.com/research/epidemiology-reporting-characteristics-systematic-reviews", "reader_count"=>366, "reader_count_by_academic_status"=>{"Unspecified"=>7, "Professor > Associate Professor"=>24, "Librarian"=>20, "Student > Doctoral Student"=>19, "Researcher"=>67, "Student > Ph. D. Student"=>64, "Student > Postgraduate"=>16, "Student > Master"=>69, "Other"=>28, "Student > Bachelor"=>21, "Lecturer"=>11, "Lecturer > Senior Lecturer"=>4, "Professor"=>16}, "reader_count_by_user_role"=>{"Unspecified"=>7, "Professor > Associate Professor"=>24, "Librarian"=>20, "Student > Doctoral Student"=>19, "Researcher"=>67, "Student > Ph. D. Student"=>64, "Student > Postgraduate"=>16, "Student > Master"=>69, "Other"=>28, "Student > Bachelor"=>21, "Lecturer"=>11, "Lecturer > Senior Lecturer"=>4, "Professor"=>16}, "reader_count_by_subject_area"=>{"Unspecified"=>22, "Agricultural and Biological Sciences"=>15, "Arts and Humanities"=>7, "Business, Management and Accounting"=>9, "Veterinary Science and Veterinary Medicine"=>1, "Computer Science"=>15, "Economics, Econometrics and Finance"=>5, "Energy"=>2, "Engineering"=>3, "Environmental Science"=>4, "Nursing and Health Professions"=>17, "Biochemistry, Genetics and Molecular Biology"=>1, "Medicine and Dentistry"=>186, "Neuroscience"=>3, "Sports and Recreations"=>9, "Pharmacology, Toxicology and Pharmaceutical Science"=>3, "Physics and Astronomy"=>2, "Psychology"=>25, "Social Sciences"=>34, "Immunology and Microbiology"=>1, "Linguistics"=>2}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>186}, "Social Sciences"=>{"Social Sciences"=>34}, "Sports and Recreations"=>{"Sports and Recreations"=>9}, "Physics and Astronomy"=>{"Physics and Astronomy"=>2}, "Psychology"=>{"Psychology"=>25}, "Unspecified"=>{"Unspecified"=>22}, "Environmental Science"=>{"Environmental Science"=>4}, "Pharmacology, Toxicology and Pharmaceutical Science"=>{"Pharmacology, Toxicology and Pharmaceutical Science"=>3}, "Arts and Humanities"=>{"Arts and Humanities"=>7}, "Engineering"=>{"Engineering"=>3}, "Neuroscience"=>{"Neuroscience"=>3}, "Energy"=>{"Energy"=>2}, "Economics, Econometrics and Finance"=>{"Economics, Econometrics and Finance"=>5}, "Immunology and Microbiology"=>{"Immunology and Microbiology"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>15}, "Computer Science"=>{"Computer Science"=>15}, "Business, Management and Accounting"=>{"Business, Management and Accounting"=>9}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>17}, "Linguistics"=>{"Linguistics"=>2}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Veterinary Science and Veterinary Medicine"=>{"Veterinary Science and Veterinary Medicine"=>1}}, "reader_count_by_country"=>{"Ecuador"=>1, "United States"=>11, "Uruguay"=>1, "Philippines"=>1, "Egypt"=>1, "United Kingdom"=>9, "Switzerland"=>2, "Spain"=>6, "Canada"=>10, "Netherlands"=>2, "Sweden"=>3, "Belgium"=>1, "Ireland"=>2, "Guatemala"=>1, "Brazil"=>1, "South Africa"=>2, "Italy"=>1, "France"=>2, "Chile"=>1, "Australia"=>3, "Nigeria"=>1, "Germany"=>3}, "group_count"=>28}

CrossRef

Scopus | Further Information

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  • {"month"=>"11", "year"=>"2016", "pdf_views"=>"19", "xml_views"=>"0", "html_views"=>"156"}
  • {"month"=>"12", "year"=>"2016", "pdf_views"=>"44", "xml_views"=>"1", "html_views"=>"141"}
  • {"month"=>"1", "year"=>"2017", "pdf_views"=>"40", "xml_views"=>"2", "html_views"=>"168"}
  • {"month"=>"2", "year"=>"2017", "pdf_views"=>"42", "xml_views"=>"6", "html_views"=>"212"}
  • {"month"=>"3", "year"=>"2017", "pdf_views"=>"28", "xml_views"=>"1", "html_views"=>"180"}
  • {"month"=>"4", "year"=>"2017", "pdf_views"=>"31", "xml_views"=>"1", "html_views"=>"214"}
  • {"month"=>"5", "year"=>"2017", "pdf_views"=>"25", "xml_views"=>"2", "html_views"=>"148"}
  • {"month"=>"6", "year"=>"2017", "pdf_views"=>"27", "xml_views"=>"3", "html_views"=>"153"}
  • {"month"=>"7", "year"=>"2017", "pdf_views"=>"30", "xml_views"=>"4", "html_views"=>"161"}
  • {"month"=>"8", "year"=>"2017", "pdf_views"=>"33", "xml_views"=>"4", "html_views"=>"173"}
  • {"month"=>"9", "year"=>"2017", "pdf_views"=>"34", "xml_views"=>"3", "html_views"=>"170"}
  • {"month"=>"10", "year"=>"2017", "pdf_views"=>"44", "xml_views"=>"4", "html_views"=>"199"}
  • {"month"=>"11", "year"=>"2017", "pdf_views"=>"47", "xml_views"=>"1", "html_views"=>"202"}
  • {"month"=>"12", "year"=>"2017", "pdf_views"=>"21", "xml_views"=>"1", "html_views"=>"135"}
  • {"month"=>"1", "year"=>"2018", "pdf_views"=>"43", "xml_views"=>"5", "html_views"=>"148"}
  • {"month"=>"2", "year"=>"2018", "pdf_views"=>"37", "xml_views"=>"0", "html_views"=>"75"}
  • {"month"=>"3", "year"=>"2018", "pdf_views"=>"43", "xml_views"=>"6", "html_views"=>"105"}
  • {"month"=>"4", "year"=>"2018", "pdf_views"=>"34", "xml_views"=>"0", "html_views"=>"112"}
  • {"month"=>"5", "year"=>"2018", "pdf_views"=>"70", "xml_views"=>"6", "html_views"=>"133"}
  • {"month"=>"6", "year"=>"2018", "pdf_views"=>"54", "xml_views"=>"8", "html_views"=>"76"}
  • {"month"=>"7", "year"=>"2018", "pdf_views"=>"38", "xml_views"=>"8", "html_views"=>"77"}
  • {"month"=>"8", "year"=>"2018", "pdf_views"=>"43", "xml_views"=>"3", "html_views"=>"84"}
  • {"month"=>"9", "year"=>"2018", "pdf_views"=>"37", "xml_views"=>"1", "html_views"=>"89"}
  • {"month"=>"10", "year"=>"2018", "pdf_views"=>"47", "xml_views"=>"2", "html_views"=>"97"}
  • {"month"=>"11", "year"=>"2018", "pdf_views"=>"38", "xml_views"=>"0", "html_views"=>"96"}
  • {"month"=>"12", "year"=>"2018", "pdf_views"=>"29", "xml_views"=>"0", "html_views"=>"75"}
  • {"month"=>"1", "year"=>"2019", "pdf_views"=>"63", "xml_views"=>"0", "html_views"=>"116"}
  • {"month"=>"2", "year"=>"2019", "pdf_views"=>"69", "xml_views"=>"0", "html_views"=>"87"}
  • {"month"=>"3", "year"=>"2019", "pdf_views"=>"60", "xml_views"=>"2", "html_views"=>"134"}
  • {"month"=>"4", "year"=>"2019", "pdf_views"=>"57", "xml_views"=>"1", "html_views"=>"135"}
  • {"month"=>"5", "year"=>"2019", "pdf_views"=>"51", "xml_views"=>"3", "html_views"=>"118"}
  • {"month"=>"6", "year"=>"2019", "pdf_views"=>"22", "xml_views"=>"1", "html_views"=>"80"}

Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/952152"], "description"=>"<p>Flow of Citations through the Cross-Sectional Identification and Retrieval of Systematic Reviews Indexed in Medline during November 2004</p>", "links"=>[], "tags"=>["citations", "cross-sectional", "retrieval", "systematic", "reviews", "indexed", "medline", "november"], "article_id"=>622434, "categories"=>["Infectious Diseases", "Biotechnology"], "users"=>["David Moher", "Jennifer Tetzlaff", "Andrea C Tricco", "Margaret Sampson", "Douglas G Altman"], "doi"=>"https://dx.doi.org/10.1371/journal.pmed.0040078.g001", "stats"=>{"downloads"=>4, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Flow_of_Citations_through_the_Cross_Sectional_Identification_and_Retrieval_of_Systematic_Reviews_Indexed_in_Medline_during_November_2004_/622434", "title"=>"Flow of Citations through the Cross-Sectional Identification and Retrieval of Systematic Reviews Indexed in Medline during November 2004", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-21 12:42:56"}

PMC Usage Stats | Further Information

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  • {"month"=>"9", "scanned-page-browse"=>"0", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"84", "year"=>"2010", "pdf"=>"28", "unique-ip"=>"74", "figure"=>"0", "scanned-summary"=>"0", "supp-data"=>"0"}
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  • {"scanned-page-browse"=>"0", "month"=>"2", "cited-by"=>"0", "abstract"=>"1", "full-text"=>"52", "unique-ip"=>"54", "pdf"=>"24", "year"=>"2011", "figure"=>"1", "scanned-summary"=>"0", "supp-data"=>"0"}
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  • {"month"=>"7", "scanned-page-browse"=>"0", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"33", "year"=>"2011", "pdf"=>"17", "unique-ip"=>"27", "figure"=>"0", "scanned-summary"=>"0", "supp-data"=>"0"}
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  • {"month"=>"11", "scanned-page-browse"=>"0", "cited-by"=>"0", "abstract"=>"1", "full-text"=>"95", "year"=>"2011", "pdf"=>"28", "unique-ip"=>"77", "figure"=>"0", "scanned-summary"=>"0", "supp-data"=>"0"}
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  • {"month"=>"4", "scanned-page-browse"=>"0", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"55", "year"=>"2012", "pdf"=>"26", "unique-ip"=>"55", "figure"=>"2", "scanned-summary"=>"0", "supp-data"=>"0"}
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  • {"scanned-page-browse"=>"39", "month"=>"4", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"4", "unique-ip"=>"0", "pdf"=>"0", "year"=>"2007", "figure"=>"89", "scanned-summary"=>"46", "supp-data"=>"65"}
  • {"month"=>"5", "scanned-page-browse"=>"31", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"4", "year"=>"2007", "pdf"=>"0", "unique-ip"=>"2", "figure"=>"78", "scanned-summary"=>"41", "supp-data"=>"46"}
  • {"scanned-page-browse"=>"24", "month"=>"6", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"3", "unique-ip"=>"0", "pdf"=>"0", "year"=>"2007", "figure"=>"60", "scanned-summary"=>"33", "supp-data"=>"42"}
  • {"month"=>"7", "scanned-page-browse"=>"21", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"0", "year"=>"2007", "pdf"=>"0", "unique-ip"=>"0", "figure"=>"51", "scanned-summary"=>"30", "supp-data"=>"33"}
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  • {"scanned-page-browse"=>"34", "month"=>"10", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"1", "unique-ip"=>"0", "pdf"=>"0", "year"=>"2007", "figure"=>"71", "scanned-summary"=>"36", "supp-data"=>"37"}
  • {"month"=>"11", "scanned-page-browse"=>"17", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"0", "year"=>"2007", "pdf"=>"0", "unique-ip"=>"0", "figure"=>"44", "scanned-summary"=>"27", "supp-data"=>"29"}
  • {"scanned-page-browse"=>"11", "month"=>"12", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"0", "unique-ip"=>"1", "pdf"=>"0", "year"=>"2007", "figure"=>"33", "scanned-summary"=>"21", "supp-data"=>"21"}
  • {"month"=>"1", "scanned-page-browse"=>"18", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"0", "year"=>"2008", "pdf"=>"0", "unique-ip"=>"1", "figure"=>"45", "scanned-summary"=>"26", "supp-data"=>"27"}
  • {"scanned-page-browse"=>"23", "month"=>"2", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"5", "unique-ip"=>"0", "pdf"=>"0", "year"=>"2008", "figure"=>"60", "scanned-summary"=>"32", "supp-data"=>"35"}
  • {"month"=>"3", "scanned-page-browse"=>"30", "cited-by"=>"0", "abstract"=>"1", "full-text"=>"1", "year"=>"2008", "pdf"=>"0", "unique-ip"=>"0", "figure"=>"80", "scanned-summary"=>"48", "supp-data"=>"40"}
  • {"scanned-page-browse"=>"14", "month"=>"4", "cited-by"=>"1", "abstract"=>"0", "full-text"=>"3", "unique-ip"=>"0", "pdf"=>"0", "year"=>"2008", "figure"=>"39", "scanned-summary"=>"22", "supp-data"=>"23"}
  • {"month"=>"5", "scanned-page-browse"=>"23", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"3", "year"=>"2008", "pdf"=>"0", "unique-ip"=>"0", "figure"=>"47", "scanned-summary"=>"21", "supp-data"=>"29"}
  • {"scanned-page-browse"=>"7", "month"=>"6", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"1", "unique-ip"=>"0", "pdf"=>"0", "year"=>"2008", "figure"=>"31", "scanned-summary"=>"23", "supp-data"=>"14"}
  • {"month"=>"7", "scanned-page-browse"=>"17", "cited-by"=>"0", "abstract"=>"2", "full-text"=>"0", "year"=>"2008", "pdf"=>"0", "unique-ip"=>"0", "figure"=>"38", "scanned-summary"=>"19", "supp-data"=>"23"}
  • {"scanned-page-browse"=>"19", "month"=>"8", "cited-by"=>"0", "abstract"=>"0", "full-text"=>"1", "unique-ip"=>"0", "pdf"=>"0", "year"=>"2008", "figure"=>"42", "scanned-summary"=>"22", "supp-data"=>"26"}
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  • {"unique-ip"=>"36", "full-text"=>"88", "pdf"=>"9", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"3"}
  • {"unique-ip"=>"40", "full-text"=>"45", "pdf"=>"8", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"4"}
  • {"unique-ip"=>"55", "full-text"=>"62", "pdf"=>"7", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"5"}

Relative Metric

{"start_date"=>"2007-01-01T00:00:00Z", "end_date"=>"2007-12-31T00:00:00Z", "subject_areas"=>[{"subject_area"=>"/Medicine and health sciences", "average_usage"=>[316, 649, 832, 963, 1057, 1142, 1222, 1308, 1394, 1478, 1570, 1662, 1753, 1841, 1934, 2011, 2085, 2155, 2239, 2294, 2373, 2440, 2509, 2583, 2652, 2705, 2768, 2824, 2886, 2931, 2974, 3041, 3094, 3160, 3228, 3293, 3346, 3407, 3478, 3536, 3596, 3653, 3708, 3751, 3801, 3857, 3911, 3958, 4018, 4077, 4139, 4197, 4234, 4271, 4299, 4360, 4403, 4483, 4560, 4646, 4707, 4753, 4807, 4896, 4943, 5009, 5070, 5133, 5196, 5272, 5338, 5413, 5479, 5566, 5646, 5711, 5780, 5849, 5903, 5984, 6054, 6132, 6214, 6283, 6349]}, {"subject_area"=>"/Medicine and health sciences/Diagnostic medicine", "average_usage"=>[262, 629, 788, 877, 979, 1094, 1186, 1287, 1408, 1514, 1626, 1725, 1822, 1897, 1992, 2091, 2173, 2245, 2317, 2394, 2466, 2530, 2610, 2675, 2728, 2795, 2842, 2901, 2932, 2987, 3047, 3127, 3196, 3243, 3327, 3395, 3443, 3494, 3547, 3625, 3694, 3761, 3854, 3926, 3984, 4025, 4068, 4142, 4190, 4247, 4299, 4345, 4407, 4517, 4584, 4639, 4716, 4796, 4848, 4913, 5005, 5079, 5158, 5256, 5328, 5374, 5436, 5488, 5548, 5603, 5649, 5712, 5789, 5880, 5938, 6001, 6073, 6149, 6212, 6277, 6329, 6379, 6438, 6507, 6581]}, {"subject_area"=>"/Medicine and health sciences/Pharmacology", "average_usage"=>[412, 769, 930, 1028, 1098, 1215, 1282, 1486, 1607, 1679, 1771, 1882, 1935, 2003, 2106, 2150, 2236, 2327, 2432, 2523, 2605, 2695, 2780, 2861, 2943, 3040, 3112, 3207, 3253, 3295, 3334, 3390, 3446, 3500, 3562, 3626, 3681, 3770, 3852, 3918, 4005, 4078, 4163, 4253, 4344, 4434, 4507, 4560, 4614, 4689, 4750, 4845, 4925, 5011, 5082, 5150, 5222, 5281, 5344, 5424, 5490, 5554, 5601, 5694, 5775, 5860, 5943, 6057, 6199, 6252, 6319, 6367, 6436, 6490, 6546, 6581, 6646, 6697, 6864, 6918, 6973, 7020, 7091, 7199, 7247]}]}
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