Prevalence and Impact of Treatment Crossover in Cardiac Surgery Randomized Trials: A Meta-Epidemiologic Study.

J Am Heart Assoc · 2019 · PMC6898839 · PMID 31663420

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nominally significantno p-value reported

Other nominally significant associations with the RR for the primary end point or for mortality occurred for the following: rate of crossover from experimental to control group (Figures S4 and S5 ); CABG trials; and trials allocating more invasive treatments to the experimental arm.

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