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Table 3 Types of evidence available in meta-research studies (n = 100) evaluating the PRISMA Statement or extensions

From: Evaluations of the uptake and impact of the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) Statement and extensions: a scoping review

Type of evidence available Frequency of studies
SR adherence to the PRISMA Statement or extensions
 Data on SR adherence to the PRISMA Statement [38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94] 57
 Data on SR adherence to a particular item of the PRISMA Statement (e.g. searching item, risk of bias assessment item) [95,96,97,98,99] 5
 Data on SR abstract adherence to the PRISMA-Abstracts extension [74, 100, 101] 3
 Data on network meta-analysis adherence to the PRISMA-Network Meta-Analysis extension [102] 1
 Data on rapid review adherence to the PRISMA Statement [103] 1
 Data on SR adherence to draft versions of the PRISMA-Child and PRISMA-Protocols Child extensions [104] 1
 Data on SR adherence to reporting standards derived from the PRISMA Statement [8, 105, 106] 3
 Data on SR abstract adherence to items derived from the PRISMA Statement [107, 108] 2
 Data on individual participant data meta-analysis adherence to items derived from the PRISMA Statement [109] 1
Characteristics associated with SR adherence to the PRISMA Statement
 Association between journal endorsement of the PRISMA Statement and SR adherence to PRISMA [38, 39, 46, 71, 77, 81, 84, 94] 8
 Association between factors other than journal endorsement (e.g. type of journal, word count, year of publication) and SR adherence to PRISMA [38, 43, 44, 46,47,48,49,50,51, 54, 57,58,59,60,61,62, 64, 66, 68, 70, 71, 73,74,75, 77, 78, 80, 82,83,84,85,86, 88,89,90, 92, 94] 37
Mention of the PRISMA Statement or extensions in journal instructions
 Frequency of journals referring to the PRISMA Statement or extensions in the instructions to authors [46, 71, 77, 81, 84, 110,111,112,113,114,115,116,117,118,119,120,121,122] 18
 Frequency of journals referring to the PRISMA Statement or extensions in the instructions to peer reviewers [112, 123] 2
Other
 Frequency of SR authors who reported using the PRISMA Statement to guide reporting [8, 71, 114, 115, 124] 5
 Frequency of editors who are aware of the PRISMA Statement [111] 1
 Frequency of inappropriate citation of the PRISMA Statement by authors [125] 1
 Association between adherence to the PRISMA Statement and citation of SRs [126] 1
 Authors’ perceived barriers and facilitators to use of the PRISMA-Equity extension [127] 1
 Authors’ views on what items are most important to report in SRs [128,129,130] 3
 Systematic reviews of meta-research studies evaluating some component of the PRISMA Statement or extensions [35,36,37, 131] 4