Facilitating Prospective Registration of Diagnostic Accuracy Studies: A STARD Initiative

Although the introduction of prospective trial registration policies has been successful in reducing waste in research, diagnostic accuracy studies are rarely registered.We describe why diagnostic accuracy studies should be registered, and where and how this can be done.Advantages of registration include that the identification of unpublished studies, prevention of selective outcome reporting, prevention of unnecessary duplication of research, collaboration between researchers and linkage of study materials.In a survey among representatives of 16 major trial registries, such as ClinicalTrials.gov,ANZCTR (Australian New Zealand Clinical Trials Registry) and the UK based ISRCTN registry (International Standard Randomised Controlled Trial Number), 13 responded of which 8 (62%) indicated they always accept registration of diagnostic accuracy studies, and 5 (38%) do so in some cases.However all but one of them (92%) indicated that their registry currently does not provide specific guidance for registering diagnostic accuracy studies.A second survey among the 85 members of the STARD Group (Standards for Reporting Diagnostic Accuracy) resulted in the identification of 14 essential protocol items and was used to develop guidance on how these items can be registered in existing major trial registries.We propose that investigators responsible for diagnostic accuracy studies should register their study, before recruiting patients, in one of the existing major trial registries that are willing to host such studies.We also propose that governmental, research and academic institutions providing funding for and journals publishing diagnostic accuracy studies require such registration.