Hello. I am working on some project to compare the mortality. I have follow up data for 3/6/9/12 months. However, I do not know the exact time when they are dead, so I though interval-censoring should be used. For example, the data that I organized looks like this. So if the person died between the start and 3 months, ltime=0, rtime=3. I read the documentation that introduces the PROC ICLIFETEST and tried it but I keep getting weird time intervals. My time intervals should be 0-3 3-6 6-9 9-12 12-inf but I get 3-3 6-6 9-9 12-12 My SAS code is proc iclifetest data=acs.data3 impute(seed=1234); time (lTime, rTime); strata indi; run; Can anyone help me what is wrong with this? And also, is there any way that I can modify the plots for PROC ICLIFETEST? I used the macro for KM plots for PROC LIFETEST but can't find a way to modify this plot (range for x and y axis) Thank you
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