BookmarkSubscribeRSS Feed
Katie
Obsidian | Level 7

I have data that looks like this:

Patient          ProgramDate         FinanceDate

A                    1/1/2012                    2/3/2012

A                      2/5/2012                    4/6/2012

A                         .                         5/25/2012

B                      2/1/2012               4/1/2012

B                         .                              4/5/2012

The data needs to look like this:

Patient          VisitDates

A                    1/1/2012

A                    2/5/2012

A                    4/6/2012

A                     5/25/2012

B                     2/1/2012

B                    4/1/2012

B                    4/5/2012

Basically I need the Finance Date to match up to a Program Date.  No Finance Dates are allowed to Match up to the earliest ProgramDate.  The finance date can be counted for in the Program Date if it occurs prior to a singular date.  This is why Patient A does not have a VisitDate for 2/3/2012.  This one is 'counted' twice and we only need to show one date.

1 REPLY 1
mohamed_zaki
Barite | Level 11

data have;

input Patient $ ProgramDate: mmddyy10. FinanceDate: mmddyy10.;

cards;

A 1/1/2012 2/3/2012

A 2/5/2012 4/6/2012

A . 5/25/2012

B 2/1/2012 4/1/2012

B . 4/5/2012

;

run;

data want (keep=Patient VisitDate);

set have;

x=lag(FinanceDate);

rename ProgramDate=VisitDate;

if ProgramDate=. then do;

    ProgramDate=x ;

        output;

    ProgramDate=FinanceDate;

        output;

end;

else output;

run;

hackathon24-white-horiz.png

Join the 2025 SAS Hackathon!

Calling all data scientists and open-source enthusiasts! Want to solve real problems that impact your company or the world? Register to hack by August 31st!

Register Now

How to Concatenate Values

Learn how use the CAT functions in SAS to join values from multiple variables into a single value.

Find more tutorials on the SAS Users YouTube channel.

SAS Training: Just a Click Away

 Ready to level-up your skills? Choose your own adventure.

Browse our catalog!

Discussion stats
  • 1 reply
  • 726 views
  • 0 likes
  • 2 in conversation