Giorgi, Roch A relative survival regression model using B-spline functions to model non-proportional hazards. [electronic resource] - Statistics in medicine Sep 2003 - 2767-84 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0277-6715 Standard No.: 10.1002/sim.1484 doi Subjects--Topical Terms: AgedColonic Neoplasms--mortalityFemaleHumansMaleMiddle AgedPrognosisProportional Hazards ModelsRegression AnalysisSurvival Analysis