Why are dates changing -- and why is intck not generating a number?

[cdubs]

My current code is.

1. The "svcdate" variable in the "have" dataset starts with 2010 dates but for some reason in the "want" dataset output, I only get dates that are based on 1960s (resembles more like the patient's birthdates)

2. my enrolled_days_tot are showing up as "." in the output dataset 😞

Anybody know what is going on here? Thank you so much!

data want;
			do until(last.enrolid);
			set have;
			where (dx1 in (&dx1_list.) or dx2 in (&dx1_list.) or dx3 in (&dx1_list.) or dx4 in (&dx1_list.))
				and age >=&age_cutoff.;
			by enrolid enroll_start_dt enroll_end_dt;
			if first.enrolid then index_dt=svcdate and enrolled_days_tot=intck('days', enroll_end_dt, enroll_start_dt);
				format index_dt date11.; 
				output;
			end;
			keep enrolid enroll_start_dt enroll_end_dt index_dt enrolled_days_tot;
		run;

[novinosrin · Accepted solution]

This is erroneous:

if first.enrolid then index_dt=svcdate and enrolled_days_tot=intck('days', enroll_end_dt, enroll_start_dt);
				

 do you mean something like:

if first.enrolid and index_dt=svcdate then enrolled_days_tot=intck('days', enroll_end_dt, enroll_start_dt);
				

or 

if first.enrolid then do;
 index_dt=svcdate;
 enrolled_days_tot=intck('days', enroll_end_dt, enroll_start_dt);
end;
				

 I am only guessing. 

[cdubs]

ahh yes! The latter! I shall try that. Thank you!!