title: Statistical aspects of prognostic factor studies in oncology.
authors.forename: R
authors.initials: R
authors.lastname: Simon
authors.forename: D G
authors.initials: DG
authors.lastname: Altman
mesh_terms: D006801:Humans; D009369:Neoplasms / Q000401:mortality / Q000628:therapy*; D011379:Prognosis; D016016:Proportional Hazards Models; D012044:Regression Analysis; D012107:Research Design; D013223:Statistics as Topic / Q000379:methods*