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D Esserman, Y Zhao, Y Tang, J Cai - Statistics in medicine, 2013 - Wiley Online Library

Sample size estimation in educational intervention trials with subgroup heterogeneity in only one arm.

Educational trials

Zhao, Cai

GSID: PcPY6HdxQeoJ

Excerpt

We present closed form sample size and power formulas motivated by the study of a psycho‐social intervention in which the experimental group has the intervention delivered in teaching subgroups whereas the control group receives usual care. This situation is different from …

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