Hi, I am new on SPSS, I hope you can provide some insights on the following. I have a data base of patients which contain multiple variables as yes=1, no=0. I want to work on this data based on multiple cases selection or subgroups, e.g. patients with variable 1 (1) which don't have variable 2 (0), but has variable 3 (1) and variable 4 (1). Variable 4 includes selected patients from the previous variables based on the output. In other words, let’s imagine we have a database from 10000 patients with crohn’s disease, I want to select ulcer location (loc-1, loc-2, loc3 and loc-4), for later comparison. However, the patients, based on ulcer location, should also be subclassifed as patients with hyperglycemia (1), which also have skin rash (1) and received corticosteroids (1). After I would later compare the same selected group with patients with hyperglycemia (1), which also have skin rash (1) and did not received corticosteroids (0). How can I do it using SPSS? I think you have to use the select cases tool, but I don’t know how to select cases (or variables) upon cases (or variables). Thank you very much in advance.