03-23-2018 05:56 PM
I am trying to do an interim analysis using the o'brien-flemming method. I found these codes. However I do not know how to edit to input my own data. This seems like a macro. My data includes ID numbers, treatment group, result before and after treatment.
proc seqdesign altref=0.4 pss stopprob errspend ; TwoSidedPocock: design nstages=4 method=poc; TwoSidedOBrienFleming: design nstages=4 method=obf; samplesize model=twosamplemean(stddev=0.8 weight=2); run;
03-24-2018 08:18 AM
It looks like the code is taken from Example 77.3 of the online user guide here:
Have you tried looking at the explanation of the syntax, which can be found (for example) here?