Summary
For survival data with several concomitant (regressor) variables a large sample non-parametric procedure is presented which provides significance tests of hypotheses about a subset of the concomitant variables. This non-iterative procedure resembles linear model methodology in simplicity and form. The method is useful to eliminate unimportant concomitant variables prior to estimation of model parameters.
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Tolley, H.D. A non-parametric test for composite hypotheses in survival analysis. Ann Inst Stat Math 30, 281–295 (1978). https://doi.org/10.1007/BF02480219
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DOI: https://doi.org/10.1007/BF02480219