title: [Explanatory essay for researchers who plan to analyse their clinical data using Cox's proportional hazard model].
abstract: Proportional hazard model was proposed by Cox as a multivariate model suitable for evaluation of prognostic factors and/or therapeutic effects. This paper aims at explaining fundamental concepts of the model for clinical researchers, as clear as possible. The relationship between hazard ratio and survival curves is demonstrated using an example of survivals calculated from an exponential function. Usage of computer programme SAS is described in brief for the readers who plan to analyse their own clinical data by this model.
authors.forename: N
authors.initials: N
authors.lastname: Hamajima
authors.forename: R
authors.initials: R
authors.lastname: Sasaki
authors.forename: A
authors.initials: A
authors.lastname: Shibata
authors.forename: S
authors.initials: S
authors.lastname: Suzuki
authors.forename: A
authors.initials: A
authors.lastname: Tamakoshi
authors.forename: K
authors.initials: K
authors.lastname: Aoki
mesh_terms: D000704:Analysis of Variance; D003627:Data Interpretation, Statistical; D005260:Female; D006801:Humans; D008297:Male; D015233:Models, Statistical; D009026:Mortality; D012984:Software