Hi, I would like to check interaction between 2 categorical variables. (outcome = drug prescription. I want to see is there any interaction variables with 'gender' variable) So I came up with following code;    proc logistic data = hira.new_161718_outp_drugcode8; model drug_code2 (event = '1') = gender age institution region mcode year gender*age; run;   and I will do this for other variables (gender*institution, gender*region, gender*mcode, gener*year) Does my approach correct? Or is there any way that I can see this at once? Does this code would allow me to do this?  proc logistic data = hira.new_161718_outp_drugcode8; model drug_code2 (event = '1') = gender age institution region mcode year gender*age gender*institution gender*region gender*mcode gener*year); run;   And when I run the code, I get following result; (I attached result screen)  Please check if my understanding is correct;  I interpret this data that there is weak interaction between gender and age, as estimate is -0.00001.  Thank you.         ... View more

Hi, I want to make 2 tables out of one original table. How can I make these tables?    <IN> Patient no. DRUG_CODE2 1 SMR 1 SMR 1 other 1 NARCOTIC 2 NARCOTIC 2 other 2 other 3 SMR 3 other 4 other 4 other   <WANT> <Table 1. SMR + NARCOTIC plus SMR+other(Non-NARCOTIC)> Patient no. DRUG_CODE2 1 SMR 1 SMR 1 other 1 NARCOTIC 3 SMR 3 other   <Table 2. Non SMR + NARCOTIC plus Other> Patient no. DRUG_CODE2 2 NARCOTIC 2 other 2 other 4 other 4 other ... View more