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How comprehensive is the Cochrane Central Register of Controlled Trials for identifying clinical trial registration?: the protocol of a diagnostic study
Yuki Kataoka
Masahiro Banno
Yasushi Tsujimoto
Novel Coronavirus
Acceso Abierto
Objectives. To evaluate whether or not systematic reviewers can use Cochrane Central Register of Controlled Trials (CENTRAL) to identify ongoing and unpublished studies instead of searching International Clinical Trials Registry Platform (ICTRP) and ( Methods. This will be a diagnostic accuracy test study. We will collect a consecutive sample of ongoing or unpublished studies on Cochrane Database of Systematic Reviews (CDSRs) during the last six months. We will use all of the records as our reference standard and evaluated whether they are part of the CENTRAL search presented in the CDSRs. The index test is the CENTRAL search using the search terms in the CDSRs, and the reference standard is the list of ongoing or unpublished studies registered on the ICTRP or in the CDSRs. We will assess the sensitivity and number needed to read. Ethics & Dissemination. This study does not require ethics approval. We registered this study protocol. We will publish the findings in a peer-reviewed journal and may present them at conferences. Discussion. This study may lessen the burden of systematic reviewers if this study clarifies CENTRAL search can be used for screening in records about ongoing or unpublished studies. Registration: UMIN-CTR: UMIN000038981 ### Competing Interest Statement The authors have declared no competing interest. ### Clinical Trial UMIN-CTR: UMIN000038981 ### Clinical Protocols [][1] ### Funding Statement This protocol was supported by no funder. ### Author Declarations All relevant ethical guidelines have been followed; any necessary IRB and/or ethics committee approvals have been obtained and details of the IRB/oversight body are included in the manuscript. Yes All necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived. Yes I understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance). Yes I have followed all appropriate research reporting guidelines and uploaded the relevant EQUATOR Network research reporting checklist(s) and other pertinent material as supplementary files, if applicable. Yes We have no additional data. [1]:
Cold Spring Harbor Laboratory Press
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