While doing analysis on NRD database with SAS 9.4, I defined IndexEvent using primary diagnosis variable (DX1) and calculated 30-day readmission rates for IndexEvent. I want to find out the Primary Diagnosis for Readmission. I want to know the reason for readmission if its same as IndexEvent or any other reason for Readmisssion. Which variable I should use to look for Readmission Primary Diagnosis?? Any Specific SAS code I should use?? Anyone familiar with this please guide. Thank you in advance!
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