On Fri, 18 Jun 2010 12:57:58 -0400, Brad Heins <hein0106@UMN.EDU> wrote:

>I am wondering how you can calculate a hazard ratio from survivals >percentages with SAS? Is there a procedure in SAS to figure this out? > >I have percentages of subject by groups that have survived to certain years >in my study, and I am trying to get a hazard ratio so I may calculate or >predict the number of days a subject has remaining in the study. > >Any help would be appreciated. Thanks. > >Brad > > >Here is an example of my data > >Group Survival% Year Number of subjects surviving >1 19.6 4 10 >1 10.6 5 5 >1 5.0 6 2 >1 2.1 7 1 >2 51.1 4 48 >2 32.9 5 31 >2 18.9 6 17 >2 9.6 7 9 -------------------------------------------------------- we may need to know how the survival % was calcuated. assume it was from KM method. we still need to know the total sample, or the first round ( at 4 year) number of censored.All in all, what i am talking about is right-censored.