It may be that a categorical test is not appropriate to these data. PROC NPAR1WAY seems more appropriate for testing the difference between waves on age.  Though it will work with grouped ages, it would be even better if you have discrete ages. ... View more

Just do a google search and you'll get the answer. Lex Jansen has a nice article on it. ... View more

Because the ADTTE is CDISC standard.  See https://www.cdisc.org/standards/foundational/adam/adam-basic-data-structure-bds-time-event-tte-analyses-v1-0   Standards can be changed, but it is a bit of a drawn out process. ... View more

"ERROR: No valid observations are found." means that every observation is has a missing value for one or more of the predictor or outcome variables. Since it occurs for the continuous variables only, that's the place to focus. Your dummy variable regression is likely overparameterized. Unless you have a lot of missing gender values, you don't need indicators for both male and female. Ditto gas and race. You may want to try PROC GLM unless you ultimately want to use some of the stepwise parameters of PROC REG. ... View more

There are a few things that might be causing this: -- Are you using the same version of EGuide?  Your saving might convert to a newer storage. -- Do you and your colleague have the same options set?  I'm not sure which ones might impact storage. -- Is your computer's storage blocksize different from your colleagues?  I wouldn't expect that big a shift, but it might. -- Are you using the same version of Windows?  That might also change storage settings. ... View more

PROC LIFETEST uses lots of memory.  Look for 'memory requirements' in the documentation   https://support.sas.com/documentation/onlinedoc/stat/131/lifetest.pdf     ... View more

To add to Reeza's comments, I'd suggest reading https://documentation.sas.com/?docsetId=lrcon&docsetTarget=n0q9ylcaccjgjrn19hvqnd9cte8p.htm&docsetVersion=9.4&locale=en for thorough coverage of the concepts. ... View more

It appears that RET is a variable and you are using it as a function. ... View more

In addition to Kurt's comments, you may be creating a number of intermediate files that are no longer needed, but are still taking up space on the disk.  Critically look at your code and perhaps add some clean-up steps. ... View more

Those difference look like round-off errors.  although both SAS and Excel use double precision FLOATING POINT arithmetic, you can get round-off errors when the numerator N is large. ... View more