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When are clinical trials registered? An analysis of prospective versus retrospective registration

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References

2004Empirical Evidence for Selective Reporting of Outcomes in Randomized Trials1,845 cited
2008Systematic Review of the Empirical Evidence of Study Publication Bias and Outcome Reporting Bias1,544 cited
2007Full publication of results initially presented in abstracts996 cited
2009Publication bias in clinical trials due to statistical significance or direction of trial results897 cited
2004Clinical trial registration: a statement from the International Committee of Medical Journal Editors408 cited
2011The Quality of Registration of Clinical Trials150 cited
2014The Quality of Registration of Clinical Trials: Still a Problem141 cited

Cited by

2023Big little lies: a compendium and simulation of p -hacking strategies118 cited
2018The cumulative effect of reporting and citation biases on the apparent efficacy of treatments: the case of depression99 cited
2020Prospective registration and reporting of trial number in randomised clinical trials: global cross sectional study of the adoption of ICMJE and Declaration of Helsinki recommendations89 cited
2018Adherence to the International Committee of Medical Journal Editors’ (ICMJE) prospective registration policy and implications for outcome integrity: a cross-sectional analysis of trials published in high-impact specialty society journals79 cited
2022Nonregistration, discontinuation, and nonpublication of randomized trials: A repeated metaresearch analysis68 cited

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2017

Comparison of Registered and Reported Outcomes in Randomized Clinical Trials Published in Anesthesiology Journals

64 cited

2018Prospective registration trends, reasons for retrospective registration and mechanisms to increase prospective registration compliance: descriptive analysis and survey52 cited

2017A systematic review of the processes used to link clinical trial registrations to their published results47 cited

2017The Conduct and Reporting of Child Health Research: An Analysis of Randomized Controlled Trials Published in 2012 and Evaluation of Change over 5 Years41 cited

2018Characteristics and publication fate of unregistered and retrospectively registered clinical trials submitted toThe BMJover 4 years40 cited

2019Methods, transparency and reporting of clinical trials in orthodontics and periodontics40 cited

2021A comparative analysis of important public clinical trial registries, and a proposal for an interim ideal one34 cited

2018Nonpublication Rates and Characteristics of Registered Randomized Clinical Trials in Digital Health: Cross-Sectional Analysis32 cited

2019Trial registration as a safeguard against outcome reporting bias and spin? A case study of randomized controlled trials of acupuncture29 cited

2025Assessing the feasibility and impact of clinical trial trustworthiness checks via an application to Cochrane Reviews: Stage 2 of the INSPECT-SR project28 cited

2017Registration of randomized controlled trials in nursing journals24 cited