cecypdel

I need to know how to interpret the analysis of maximum likelihood estimates output in SAS after using a phrec procedure with backwards selection. Here is an example output. The code looks something like this: proc phreg data="map.sas7bdat"; model survival*censor(1) = After_Blood_Return __hr_After_60_Blood_Loss After_60_Blood_Loss _0_min_After_40_Blood_Loss After_40_Blood_Loss Before_Hypotension /selection=backward; run;