```Date: Mon, 21 Jun 2010 12:38:49 -0400 Reply-To: Brad Heins Sender: "SAS(r) Discussion" From: Brad Heins Subject: Re: Hazard Ratios for Survival Analysis Comments: To: SUBSCRIBE SAS-L JingJu11 S I calculated the survival percent by dividing the the number that survived to each year by the total. The total number of subjects for group 1 was 51 and 94 for group 2. (from below 10/51 =19.6% which is the total survived to year4). I then projected the survival to year 5, 6, and 7 based on the change in survival from 1,2,3,and 4 years. I am new to survival analysis, but I was guess that 10 or 51 were censored in group 1, and 48 of 94 were censored in group 2. Any help is much appreciated. Thanks. >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. -------------------------------------------------------- >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 ```

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