TROMSO_STR_HIST1

Name: STR_HIST1

Description and values:

• 1 = yes
• 0 = no
• 9 = insufficient data

Code 1 if history of stroke was documented in some source of information such as a physician's report/questionnaire, person's medical records, a hospital discharge register, or other population-based register 

Code 0 if such source was used to assess history of stroke, and no such previous event could be detected.

Code 9 no such source of information was used or if information of such assessment is not available.

Local variable explanation:

datoslag= date of documented stroke

dslag= documented stroke

date_t4: date of examination

SAS code:

if datoslag ne . and dslag =1 and sign(datoslag-date_t4)=-1 then STR_HIST1=1;

else STR_HIST1=0;     

NSWEDEN_STR_HIST1

if contact_age=>AGE_STROKEDIAGN then STR_HIST1=1;
if contact_age<AGE_STROKEDIAGN then STR_HIST1=0;
if AGE_STROKEDIAGN=. and BBB=1 then STR_HIST1=9;
if BBB=. then STR_HIST1=0;

AGE_STROKEDIAGN is the age at the stroke diagnosis.
BBB=1 means that the person exists in the stroke registry.

MORGAM_STR_HIST1

This is derived from the MORGAM variable HISSTR1 using the following rule:

.