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A metaresearch study revealed susceptibility of Covid-19 treatment research to white hat bias: first, do no harm.

ABSTRACT:

Objective

To investigate the presence of white hat bias in Covid-19 treatment research by evaluating the effects of citation and reporting bias.

Study design and setting

Citation bias was investigated by assessing the degree of agreement between evidence provided by a remdesivir randomized controlled trial and its citing articles. The dissimilarity of outcomes derived from nonrandomized and randomized studies was tested by a meta-analysis of hydroxychloroquine effects on mortality. The differential influence of studies with beneficial over those with neutral results was evaluated by a bibliometric analysis.

Results

The articles citing the ACTT-1 remdesivir trial preferentially presented its positive outcomes in 55.83% and its negative outcomes in 6.43% of cases. The hydroxychloroquine indicated no significant effect by randomized studies, but a significant survival benefit by nonrandomized ones. Citation mapping revealed that the study reporting survival benefit from the hydroxychloroquine-azithromycin combination was the most influential, despite subsequent studies reporting potential harmful effects.

Conclusion

The present study raises concerns about citation bias and a predilection of reporting beneficial over harmful effects in the Covid-19 treatment research, potentially in the context of white hat bias. Preregistration, data sharing and avoidance of selective reporting are crucial to ensure the credibility of future research.

SUBMITTER: Bellos I

PROVIDER: S-EPMC7997163 | biostudies-literature |

REPOSITORIES: biostudies-literature

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