Studies where two outcomes in one patient are compared with one another, are often called crossover studies, and the observations are called paired observations. As paired observations are usually more similar than unpaired observations, special tests are required in order to adjust for a positive correlation between the paired observations.
CITATION STYLE
Cleophas, T. J., & Zwinderman, A. H. (2016). Paired Continuous Data (Paired T-Test, Wilcoxon Signed Rank Test). In Clinical Data Analysis on a Pocket Calculator (pp. 31–36). Springer International Publishing. https://doi.org/10.1007/978-3-319-27104-0_6
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