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Plos One|October 3, 2022
Comparison of variable selection procedures and investigation of the role of shrinkage in linear regression-protocol of a simulation study in low-dimensional dataEdwin Kipruto, Willi SauerbreiBiometrical Journal. Biometrische Zeitschrift|September 27, 2024
Post-Estimation Shrinkage in Full and Selected Linear Regression Models in Low-Dimensional Data RevisitedEdwin Kipruto, Willi SauerbreiDiagnostic and Prognostic Research|April 18, 2023
Effects of influential points and sample size on the selection and replicability of multivariable fractional polynomial modelsWilli Sauerbrei, Edwin Kipruto, James BalmfordAdvances in Oto-Rhino-Laryngology|December 21, 2004
Prognostic factors. Confusion caused by bad quality design, analysis and reporting of many studiesWilli SauerbreiBMC Medical Research Methodology|April 6, 2022
Investigating treatment-effect modification by a continuous covariate in IPD meta-analysis: an approach using fractional polynomialsWilli Sauerbrei, Patrick RoystonBiometrical Journal. Biometrische Zeitschrift|February 18, 2011
Comparison of procedures to assess non-linear and time-varying effects in multivariable models for survival dataAnika Buchholz, Willi SauerbreiStatistics in Medicine|April 13, 2013
Interaction of treatment with a continuous variable: simulation study of significance level for several methods of analysisPatrick Royston, Willi SauerbreiStatistics in Medicine|February 26, 2004
A new measure of prognostic separation in survival dataPatrick Royston, Willi SauerbreiThe Stata Journal|February 6, 2018
mfpa: Extension of mfp using the ACD covariate transformation for enhanced parametric multivariable modelingPatrick Royston, Willi SauerbreiStatistics in Medicine|July 4, 2007
Modelling to extract more information from clinical trials data: On some roles for the bootstrapWilli Sauerbrei, Patrick RoystonPageof 8