Abstract
IntroductionPRISMA statement was published in 2009 in order to set standards in the reporting of systematic reviews and meta-analyses. Our aim was to evaluate the impact of PRISMA endorsement on the quality of reporting and methodological quality of systematic reviews and meta-analyses, published in journals in the field of gastroenterology and hepatology (GH).MethodsQuality of reporting and methodological quality were evaluated by assessing the adherence of papers to PRISMA checklist and AMSTAR quality scale. After identifying the GH journals which endorsed PRISMA in instructions for authors (IA), we appraised: 15 papers published in 2012 explicitly mentioning PRISMA in the full text (Group A); 15 papers from the same journals published in 2012 not explicitly mentioning PRISMA in the full text (Group B); 30 papers published the year preceding PRISMA endorsement from the same journals as above (Group C); 30 papers published in 2012 on the 10 highest impact factor journals in GH which not endorsed PRISMA (Group D).ResultsPRISMA statement was referred in the IA in 9 out of 70 GH journals (12.9%). We found significant increase in overall adherence to PRISMA checklist (Group A, 90.1%; Group C, 83.1%; p = 0.003) and compliance to AMSTAR scale (Group A, 85.0%; Group C, 74.6%; p = 0.002), following the PRISMA endorsement from the nine GH journals. Explicit referencing of PRISMA in manuscript was not associated with increase in quality of reporting and methodological quality (Group A vs. B, p = 0.651, p = 0.900, respectively). Adherence to PRISMA checklist, and the compliance with AMSTAR were significantly higher in journals endorsing PRISMA compared to those not (Groups A+B vs. D; p = 0.003 and p = 0.016, respectively).ConclusionThe endorsement of PRISMA resulted in increase of both quality of reporting and methodological quality. It is advised that an increasing number of medical journals include PRISMA in the instructions for authors.
Highlights
PRISMA statement was published in 2009 in order to set standards in the reporting of systematic reviews and meta-analyses
That led to development of the QUality Of Reporting Of Meta-analysis (QUOROM) statement in 1996 [6], which was expected to set some standards in drafting of metaanalysis of randomized clinical trials [7]
Assessing endorsement all of 74 gastroenterology and hepatology (GH) journals mentioned in the instruction for authors that they publish systematic reviews and/or meta-analyses, our MEDLINE search could not identify any systematic reviews or meta-analyses ever published in 4 journals, so they were excluded from the further selection process
Summary
PRISMA statement was published in 2009 in order to set standards in the reporting of systematic reviews and meta-analyses. The number of systematic reviews and meta-analyses published in scientific journals is increasing every year [1]. Nowadays these tools represent a basis to develop recommendations and guidelines, and a valuable source in assisting physicians in the decisions making process [2,3]. In the past some studies reported a low quality of the systematic reviews and meta-analyses published in some of the leading medical journals [4,5]. Around 30% of medical journals publishing systematic reviews have endorsed PRISMA statement in their author’s guidelines [9]
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