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It is unknown if verified prospective registration of systematic reviews (SRs) and the randomized clinical trials (RCTs) that they use affect an SR’s methodological quality on A MeaSurement Tool to Assess Systematic Reviews 2 (AMSTAR 2). Data originated from interventional SRs published in International Society of Physiotherapy Journals Editors (ISPJE) member journals, indexed in MEDLINE, between 1 January 2018 and 18 August 2021. Blinded reviewers identified the SRs and extracted the data for the variables of interest for the SRs and the RCTs. Two of 14 ISPJE member journals required prospective SR registration. Twenty SRs were identified, and 169 unique, retrievable RCTs were included within those SRs. One (5.0%) of the 20 SRs and 15 of the 169 (8.9%) RCTs were prospectively registered  and  published consistent with this intent. Nineteen (95.0%) of the 20 identified SRs was categorized as ‘critically low’ on the AMSTAR 2. SRs and the RCTs identified within them were infrequently prospectively registered, prospectively verifiable, or prospectively verified based on the established research record. Ensuring that SRs and RCTs have fidelity with the research record from conception to publication may help rule out low-value interventions, decrease variability in physical therapy practice, and solidify evidence-based physical therapy practice.

Is the quality of systematic reviews influenced by prospective registration: a methods review of systematic musculoskeletal physical therapy reviews