Composite Hypertension
Name ht_comp
Chapter Circulatory disease/Hypertension
Definition
Patient diagnosed by GP as hypertensive or has minimum of 3 measurements

of raised systolic or diastolic blood pressure within 1 year. Lower cut-offs

applied for diabetic patients. Applied by researcher to relevant date
Data Type Categorical
Data sources GPRD
Repeated Yes
Valid event date range 01/01/1900 - 25/03/2010
Agreed 02.03.2011 (Revision 1)
Category Definition
0 Normotensive
1 Hypertensive
Implementation
IF HT = 1, THEN HT_comp = 1

For non-diabetic patients:
IF there are at least three occurences of (SYS_BP  >= 140 mmHg OR DIAS_BP >= 90 mmHg) within 1 year of relevant date) OR if there are at least three occurences of  (BP_cat = 3) within 1 year of relevant date
THEN HT_comp = 1

For diabetic patients:
IF there are at least three occurences of (SYS_BP >= 130 mm OR DIAS_BP >= 80 mmHg) within one year of relevant date OR if there are at least three occurences of  (BP_cat = 3) within 1 year of relevant date
THEN HT_comp = 1
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