Adherence to the PRISMA statement and risk of bias assessment in Systematic Reviews in rehabilitation journals: a protocol for a meta-research study

Objective: The aim of this study will be to assess the adherence to the reporting quality standards set forth in the PRISMA Statement checklist of a random sample of systematic reviews (SRs) published in rehabilitation journals, and to assess the association between this adherence and the risk of bias of these SRs. Methods and Analysis: A cross-sectional analysis is planned on a random sample of 200 SRs published between 2011and 2020 in the 68 journals indexed under rehabilitation category in InCites Journal Citation Report. Randomization will be stratified by publication date and journal ranking (quartile range; Q1-2 and Q3-4) to include an equal number of studies from 2011 to 2015 (Q1-Q2=50 and Q3-Q4=50) and from 2016 to 2020 (Q1-Q2=50 and Q3-Q4=50). SRs (with or without meta-analysis) published between 2011 and 2020 as full-text scientific articles in the 68 rehabilitation journals will be included. Narrative reviews, mixed-methods reviews, meta-ethnography reviews, umbrella reviews, scoping reviews, editorials, letters and news reports will be excluded. The primary analysis will address the completeness of the reporting for each study and the relationship between PRISMA adherence and risk of bias. This will be a descriptive analysis through descriptive statistics and graphical representation. Ethics and Dissemination: Several studies have shown the positive influence of reporting guidelines on the completeness of research reporting but no one investigated the use and the appropriateness of reporting guidelines in physical therapy research. Therefore, this study will add relevant knowledge that may contribute to improve further the reporting of rehabilitation research. The results of this research will be published in a peer-reviewed journal and will be presented at relevant (inter)national scientific events.