S-phase Fraction of Tumor Cells
S-phase fraction of tumor cells in breast cancer patients.
data("sphase")This data frame contains the following columns:
S-phase fraction
recurrence free survival
censoring indicator: FALSE means censored,
TRUE is an event.
The data have been used to address the question whether a simple cutpoint in S-phase fraction can be used to discriminate between patients with good and bad prognosis (for example in Hothorn & Lausen, 2003).
J. Pfisterer, F. Kommoss, W. Sauerbrei, D. Menzel, M. Kiechle, E. Giese, M. Hilgarth & A. Pfleiderer (1995). DNA flow cytometry in node positive breast cancer: Prognostic value and correlation to morphological and clinical factors. Analytical and Quantitative Cytology and Histology 7(6), 406–412.
Torsten Hothorn & Berthold Lausen (2003). On the Exact Distribution of Maximally Selected Rank Statistics. Computational Statistics & Data Analysis 43(2), 121–137.
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