This makes sense now! Thank you for the explanation I appreciate it!! ... View more

I forgot the groups = 4 and added that in. Here is a snippet of what my visitdata4 looks like.  Then I run this code:  /*sex-specific quartiles*/ proc sort data=visitdata4; by sex; run; proc rank data=visitdata4 out=visitdata5 groups =4 ; by sex; var zdelta_muac zdelta_bmi; ranks q4s_zdelta_muac q4s_zdelta_bmi; run;    and it now visitdata 4 looks like this:   Here is the log for the proc rank: NOTE: There were 197 observations read from the data set WORK.VISITDATA4. NOTE: The data set WORK.VISITDATA5 has 197 observations and 25 variables. NOTE: PROCEDURE RANK used (Total process time): real time 0.00 seconds user cpu time 0.00 seconds system cpu time 0.00 seconds memory 2831.28k OS Memory 23724.00k Timestamp 04/23/2024 06:59:36 PM Step Count 99 Switch Count 4 Page Faults 0 Page Reclaims 251 Page Swaps 0 Voluntary Context Switches 20 Involuntary Context Switches 0 Block Input Operations 0 Block Output Operations 528   thanks for the help! ... View more