12-07-2011 11:39 AM
I am trying to find out the hazard of a given group that makes up the hazard ratio. For example, comparing two treatement arms (A & B), I get a hazard ratio of 0.626. Since this value is a ratio, what are the two numbers that make up that raio?
I have decided that the computation for the Cox proportional hazards model is too intense to do by hand, which is why all sources doing survival analysis by hand show how to create the Kaplan-Meier curve by hand and then stop to refer the reader to a statistical package to get the hazard ratio. Please let me know if I am misundertanding something here.