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DrKkhan

sample size

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which study design require largest sample size, equivalance or superiority trial?

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spmm says equivalance trial

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MRPsych Mentor says: "Superiority: whilst this may seem the natural aim of a trial one problem is the large sample size needed to show a significant benefit over an existing treatment

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thanks. I find mentor answers more valid

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Textbook says superiority trials.

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