Activated partial thromboplastin time (APTT) ratio
Name aptt_ratio_gprd
Chapter Diseases of the blood/Coagulation tests
Activated partial thromboplastin time ratio. 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)
IF Read code IN aptt_ratio_gprd codelist

AND enttype = 322

AND data2 [value] > 0 AND data2 < 20

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

THEN aptt_ratio_gprd = data2
Codelist version1
Codelist authorsAnoop Shah
Creation date27 Jun 2013
Category (code) Read code Read term CPRD Medcode
(1) 42Qt.00 Partial thromboplastin time ratio 27168
(1) 42Qu.00 Activated partial thromboplastin time ratio 14282
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