TROMSO_STR2_AGE

Name: STR2_AGE

Description and values:

STR2_AGE gives the age (in years) at the time of exit from the follow-up of a likely cerebral infarction.

The variable has no missing values.

Local variable explanation:

DIAGISCH: Diagnose of ischemic cerebral infarction (1=definite)

DATOISCH: Date of diagnose of ischemic cerebral infarction

FLYTTEDATO: Date of relocation from town/municipality

DATE_T4: Date of examination

DATO_DOD: Date of death

fdato: date of death

SAS code:

If DIAGISCH = 1 and (sign(DATOISCH -'31dec2010'd)=1 or sign(DATE_T4 - DATOISCH)=1) then do;

DIAGISCH=.;

DATOISCH=.;

end;

IF DIAGISCH = 1 and sign(DATOISCH-FLYTTEDATO)=1 then do;

STR2_AGE=year(FLYTTEDATO) - year(fdato);

end;

ELSE IF DIAGISCH = 1 and .<(DATO_DOD -DATOISCH)<=28 then do;

STR2_AGE=year(DATOISCH) - year(fdato);

end;

else if DIAGISCH = 1 then do;

STR2_AGE=year(DATOISCH) - year(fdato);

end;

else do;

STR2_AGE=year(min(FLYTTEDATO,dato_dod,'31dec2010'd)) - year(fdato);

end;

MORGAM_STR2_AGE

This was obtained from the MORGAM derived variable STRAGE3.

If STRAGE3 = 888.88 or 999.99, CONTACT_AGE is coded for STR2_AGE.