International normalised ratio (INR)
Name inr_gprd
Chapter Diseases of the blood/Coagulation tests
Definition
International normalised ratio, the blood test used to monitor the dose of warfarin. Values of 20 or greater are considered to be errors.
Data Type Continuous
Data sources GPRD
Dictionaries Read
Repeated Yes
Units ratio
Range (min/max) 0-20
Valid event date range 01/01/1900 - 25/03/2010
Agreed 27 Jun 2013 (Revision 1)
Implementation
IF Read code IN inr_gprd codelist

AND enttype = 323

AND data2 [value] > 0 AND data2 < 20

AND data3 [units] IN (151 [ratio], 161 [1/1], 0, Missing)

THEN inr_gprd = data2
Codelist version1
Codelist authorsAnoop Shah
Creation date27 Jun 2013
Category (code) Read code Read term CPRD Medcode
(1) 42QE.00 International normalised ratio 71
(1) 42QE000 INR - international normal ratio normal 14283
(1) 42QE100 INR - international normal ratio abnormal 19844
(1) 42jr.00 International normalised ratio using testing strip 95928
(1) 66Q..00 Warfarin monitoring 4471
(1) 66Q8.00 International normalised ratio deviation from target 28975
(1) 66QE.00 Self monitoring of international normalised ratio 94663
(1) 66QG.00 International normalised ratio derived warfarin dose 98802
(1) 66QZ.00 Warfarin monitoring NOS 33889
(1) 9k21.00 International normalised ratio monitorin in general practice 31179
(1) 9k22.00 INR within target range - enhanced services administration 96914
(1) 9k22.11 International normalised ratio within target range 96228
(1) 9k25.00 INR below target range - enhanced services admin 97940
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