PROC SURVEYREG does not support the PARAM=REF option on the CLASS statement, so I suggest you check your SAS log for as error message that says    15 class region14 ... / param=ref; ----- 22 202 NOTE: The previous statement has been deleted. ERROR 22-322: Syntax error, expecting one of the following: ;, REF, REFERENCE.   Notice that the error log says that the CLASS statement is being deleted. Therefore the variables are treated as continuous variables.   Get rid of the PARAM= option and that should fix the issue. ... View more

Note that you only need to specify a nested effect (or interaction) in the SUBJECT= option if you don't have a single variable that has a unique value for each cluster of repeated measures. See this note. The warnings are general messages indicating that the GEE model fitting algorithm did not properly converge. Changes to the model (usually simplifications) are generally necessary to avoid them. However, if your data are survey data, you should not be using GENMOD anyway since it does not have the proper variance estimators for survey data analysis. ... View more

If you want the missing values converted to zeroes, you can use code like this to replace them all at once.   data work.out_dataset;   set WORK.your_dataset; array nums _numeric_;   do over nums; if nums=. then nums=0; end; run; ... View more

I see that there is a problem with these lines use monika.covar; read all var _num_ into V; use monika.cont1; read all var _num_ into DC1DB; use monika.cont2; read all var _num_ into DC2DB; use monika.cont3; read all var _num_ into DC3DB; use monika.cont4; read all var _num_ into DC4DB; use monika.cont5; read all var _num_ into DC5DB; use monika.cont6; read all var _num_ into DC6DB; My log states that all of the above datasets do not have numeric variables. Is there a way to code the above same code for categorical variables? Please let me know. ##- Please type your reply above this line. Simple formatting, no attachments. -## ... View more

Sorry. I have no time to check all these code. It is too long. Start a brad new session, post your code too,and let others see this . ... View more

Please post it in a data step with datalines. ... View more

Hello Reeza,  Thank you so much. My code works now. Actually I have never worked on stata so I have no idea how it works. And since I need to finish my thesis I do not have the time to learn a new software. I will base of my analysis off this code and try to work with it. I may have some more posts regarding this test and would really appreciate your help. Thank you. ... View more