Additional file 1 of Sample size calculations for indirect standardization

Additional file 1. Sample Dataset for Application of Proposed Methodology (data.csv). To protect patient confidentiality, the hospitals providing the example data used in this paper have not given permission for the data to be made publicly available. We have, however, included a limited “fake” version of the dataset. This dataset contains 3 variables - dlp.over indicates whether an exam is “high dose,” sizeC is an ID indicating the combination of anatomic area examined and patient size category, while fac is an ID indicating the hospital the exam was performed in. Information on which ID values are associated with which anatomic areas, patient sizes, and hospital will not be provided, as they are not necessary for the illustration of statistical methods described in the paper. Note that since the dataset made available is different from the dataset used in the paper, the results should be expected to be comparable, but not identical. The software implementing the methods described in this article is available on request from the author.