Hi, I have a data something like this ID Visit date Gender of Sex partner 11263 9/1/2017 2 11263 9/6/2017 9 11263 9/13/2017 9 11736 9/4/2018 1 11736 9/14/2018 9 11891 6/6/2017 9 11891 7/17/2017 2 11891 8/2/2017 2 11894 8/9/2017 9 11894 9/18/2017 9 11893 9/21/2017 3 11893 10/20/2017 9 gender of sex partners(gender_sp) code is 1=male, 2-female, 3=both, 9=unknown I want to copy mostly prior visit's gender of sex partners' info to other visits . in some situation gender of sex partner is missing in fist visit but is available in second visit. I want to copy gender of sp to all visit if it is the same patient. How can i do this? I have 9588 records cannot fix this manually. Please help. SAS community is a GREAT resource for me. i want like this from the previous table ID Visit date Gender of Sex partner 11263 9/1/2017 2 11263 9/6/2017 2 11263 9/13/2017 2 11736 9/4/2018 1 11736 9/14/2018 1 11891 6/6/2017 2 11891 7/17/2017 2 11891 8/2/2017 2 11894 8/9/2017 9 11894 9/18/2017 9 11893 9/21/2017 3 11893 10/20/2017 3
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