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Amid ongoing controversy over clinical trial transparency, a new analysis found that just 3% of the more than 3,700 studies run exclusively in Canada over a recent 10-year period were registered prospectively, reported results, and published the findings.

More specifically, 47% of those trials, or more than 1,770, were registered in advance, while only 12% reported results in a registry and 48% published their findings. The analysis examined trials that were completed between 2009 and 2019.


By comparison, the research also found that disclosure was much higher when looking at trials that were simultaneously conducted in Canada and at least one other country. Of nearly 3,000 such trials, 74% were registered in advance, 75% reported results in a registry, and 65% published the results. In all, 41% took all three of those steps concurrently.

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