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Review
. 2022 Feb 6;22(1):41.
doi: 10.1186/s12874-021-01500-w.

Registration and primary outcome reporting in behavioral health trials

Nicholas J Taylor  1 , Dennis M Gorman  2
Affiliations
Review

Registration and primary outcome reporting in behavioral health trials

Nicholas J Taylor et al. BMC Med Res Methodol. .

Abstract

Background: Registration of research studies is designed to lock investigators into a data collection and analysis plan before a study starts and thereby limit their ability to engage in flexible data analysis and selective outcome reporting. Studies of registered clinical trials show that one- to two-thirds are registered after the study has started and that non-adherence to important design and analytic features, such as reporting data pertaining to all primary outcomes, remains high. Less is known about the effects of registration on research transparency and integrity outside of clinical trials. To address this gap in knowledge, the current study examined the effects of registration on the reporting of research findings in a sample of behavioral health trials published in BMC Public Health.

Methods: Registered trials published in the BMC Public Health section "Health Behavior, Health Promotion and Society" between 2011 and 2015 were included in the study. For each trial, we reviewed associated online submissions from 13 different registration sites. For those determined to have been prospectively registered, we used the trial registry, MEDLINE (Pubmed), PsychINFO, Web of Science and e-mails to investigators to identify subsequent publications from the study that reported results pertaining to primary outcomes. The two investigators then independently reviewed the outcome publication(s) and compared the primary outcomes reported in these to the registered primary outcomes.

Results: The final analytic sample comprised 136 locatable, registered trials with an identifiable start date. Sixty-eight of the 136 were prospectively registered. Among these prospectively registered trials, only 16 published manuscripts reported outcomes and methods that were concordant with their registrations.

Conclusions: Retrospective submission of protocols for publication and retrospective registration remain common in public health research, and adherence to prespecified outcomes is rare. In its current form, registration of behavioral and health promotion trials is likely to have minimal effect on preventing selective outcome reporting in publications, and the pervasiveness of vague and incomplete registry entries means that registries will have limited utility in terms of facilitating replication studies.

Keywords: Behavioral health interventions; Randomized trials; Replication; Selective outcome reporting; Study protocols; Trial registration.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Flow chart illustrating protocols identified in the Health Behavior, Health Promotion and Society section of BMC Public Health between 2011 and 2015, as well as the subsequent adjudication of RRCTs and publications included in the analysis
See this image and copyright information in PMC

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