Hi Reeza, thank you for looking into this too. I will attach practice data momentarily. So for patient 1 with a start date (start_dt) of June 1, 2013, instead of the variable "day1", i want a variable to be renamed JUN012013, and still have have the values of 1. This However, for patient 2 with a start+_dt of June 4, 2013, I want the variable day 1 to be renamed JUN042013 and take the value of 0. Bes,t C
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