Hi Reeza, Thanks for your reply and sorry for being unclear (I am not fully fluent in English and that may explain why) To clarify, lets consider the 'exclusion_variable' as 'death' and that the ID=1x is dead (case=1) and is to be excluded from the dataset (if death=1 then delete). As the ID 2x, and 3x are matched to the ID 1x (i.e. same matching_ID) I would like to delete these ID from the dataset to preserve the matching nature of the overall dataset. So, How can I can suppress these matched ID? Hope this clarifies. Thank you very much
... View more