##  [Cox Proportional Hazards Model](/index.php/cox-proportional-hazards-model) 

  ##  [Cox Proportional Hazards Model](https://health.quantumdictionary.io/cox-proportional-hazards-model-0) 

  

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**Health & Life Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A semiparametric survival model in which the hazard function at time t for an individual equals an unspecified baseline hazard multiplied by an exponential function of covariates (hazard(t|X) = h0(t) exp(βX)); it models the relative instantaneous risk of a time-to-event outcome and accommodates right-censoring without specifying the baseline hazard form, under the proportional hazards assumption t