https://communities.sas.com/t5/SAS-Programming/How-to-code-which-participants-to-use/m-p/867069#M342460 <P>Plesse post some example data (as text, not as pictures or Excel files, ideally in a DATA step with DATALINES), so we get a feel for the structure of your data.</P> Wed, 29 Mar 2023 16:36:17 GMT Kurt_Bremser 2023-03-29T16:36:17Z https://communities.sas.com/t5/SAS-Programming/How-to-code-which-participants-to-use/m-p/867068#M342459 <P>I am pretty beginner so excuse me if this is a remedial question, I have tried googling the answer and haven't been able to find the answer.</P><P>I am working with survey data that has two waves. I want to only use the participants that answered the survey for both waves and throw out the ones who did not do the follow up. I have both waves merged into the same large set, so ideally what I want to do is delete out any of the participants in the first wave that do not have follow ups attached.</P><P>What is the best way to go about this?</P> Wed, 29 Mar 2023 16:32:43 GMT https://communities.sas.com/t5/SAS-Programming/How-to-code-which-participants-to-use/m-p/867068#M342459 n1ojima 2023-03-29T16:32:43Z https://communities.sas.com/t5/SAS-Programming/How-to-code-which-participants-to-use/m-p/867069#M342460 <P>Plesse post some example data (as text, not as pictures or Excel files, ideally in a DATA step with DATALINES), so we get a feel for the structure of your data.</P> Wed, 29 Mar 2023 16:36:17 GMT https://communities.sas.com/t5/SAS-Programming/How-to-code-which-participants-to-use/m-p/867069#M342460 Kurt_Bremser 2023-03-29T16:36:17Z