Transcription of The Stratified Cox Procedure - New Jersey Institute of ...
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The Stratified Cox Procedure - New Jersey Institute of ...
5 TheStratifiedCoxProcedure1731745. The Stratified Cox ProcedureIntroductionWe begin with an example of the use of the Stratified Coxprocedure for a single predictor that does not satisfy the PHassumption. We then describe the general approach for fittinga Stratified Cox model, including the form of the (partial) like-lihood function used to estimate model also describe the assumption of no interaction that istypically incorporated into most computer programs thatcarry out the Stratified Cox Procedure .
01(t) ⇒ Survival curve for females h 02(t) ⇒ Survival curve for males {Estimates of β 1 and β 2: Maximize partial likelihood (L), where L = L 1 × L 2 L 1 is the likelihood for females derived from h 1(t), and L 2 is the likelihood for males derived from h 2(t). Nevertheless, because the SEX variable is not included in the model, it is ...
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