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Results tagged with proportional-hazards
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user 212509
Proportional hazards is an assumption of the Cox proportional hazards model of survival analysis and some other models as well. The assumption is that a linear increase in the predictor will have a uniform multiplicative relationship with the hazard.
2
votes
Proportional hazards assumption and time-dependent covariates
As Serpico suggests, the Cox model with time-dependent covariates is no longer a proportional hazards model. Here is a quote from David Collett's book, Modelling Survival Data in Medical Research (2nd …
- 313
4
votes
Does the proportional hazards assumption still matter if the covariate is time-dependent?
I may be wrong but I believe that Björn's answer is not completely correct. The proportional hazards assumption means that the ratio of the hazard for a particular group of observations (determined by …
- 313