Abstract
The degree of publication bias and impact of the Food and Drug Administration Amendments Act (FDAAA) of 2007, which aimed to improve clinical trial transparency, has yet to be examined for recent dermatologic drugs. The objective of our study was to estimate the degree of publication bias for clinical trials supporting FDA approval of new dermatologic drugs. This retrospective cohort study examined all phase II and III efficacy trials supporting approval of new dermatologic drugs from 2003 to 2018. FDA drug approval documents were reviewed for supportive clinical trial information, and publications were matched using PubMed and Google Scholar searches. Ratios of relative risks (RRR) comparing positive versus non-positive trials before and after FDAAA enactment served to estimate publication bias. We found that the likelihood of publishing positive versus non-positive drug trials in dermatology was unchanged before and after FDAAA enactment (RRR 0.87, 95% CI 0.37–2.08), as was the likelihood of publishing without misleading interpretation (RRR 1.51, 95% CI 0.22–10.50). There was no measurable publication bias for efficacy trials supporting new drug approvals in dermatology over the past 15 years. Fewer pre-FDAAA trials (n = 21) compared to post-FDAAA trials (n = 106) met inclusion criteria. Though not analyzed in this study, safety and secondary efficacy results are other potential sources for publication bias.
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Abbreviations
- FDAAA:
-
Food and Drug Administration Amendments Act
- FDA:
-
Food and Drug Administration
- NDA:
-
New drug application
- CDER:
-
Center for Drug Evaluation and Research
- CBER:
-
Center for Biologics Evaluation and Research
- INN:
-
International non-proprietary name
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SR is supported by the National Institutes of Health 5T32AR007569-24 Grant.
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Sairekha Ravichandran had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Ezaldein, Ravichandran, and Scott were responsible for study concept and design, acquisition, analysis, and interpretation of data, and drafting of the manuscript. Ravichandran, Mulligan, Ezaldein, and Scott critically revised the manuscript for important intellectual content. Ravichandran carried out statistical analysis. No specific funding was obtained for this research. Ezaldein and Scott were involved in administrative, technical, or material support and study supervision.
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The authors report no conflicts of interest relevant to this work. This work was presented as a poster at the Orlando Dermatology Aesthetic & Clinical Conference in Orlando, Florida, on January 17–20, 2020.
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This study met the definition of Institutional Review Board exempt research.
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Ravichandran, S., Mulligan, K.M., Ezaldein, H.H. et al. Evaluating publication bias for clinical trials supporting new dermatologic drug approvals from 2003 to 2018. Arch Dermatol Res 315, 831–838 (2023). https://doi.org/10.1007/s00403-022-02449-6
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DOI: https://doi.org/10.1007/s00403-022-02449-6