Partial thromboplastin time
Name partial_thromboplastin_time_gprd
Chapter Diseases of the blood/Coagulation tests
Partial thromboplastin time (PTT or APTT) in seconds (not ratio, which is a separate variable). Values greater than 200 seconds are considered to be errors.
Data Type Categorical
Data sources GPRD
Dictionaries Read
Repeated Yes
Units seconds
Range (min/max) 0-200
Valid event date range 01/01/1900 - 25/03/2010
Agreed 27 Jun 2013 (Revision 1)
Category Definition
IF Read code IN partial_thromboplastin_time_gprd codelist

AND enttype = 322

AND data2 [value] > 0 AND data2 < 200

AND data3 [units] IN (152 [second], 124 [s], 23 [/second])

THEN partial_thromboplastin_time_gprd = data2
Codelist version1
Codelist authorsAnoop Shah
Creation date27 Jun 2013
Category (code) Read code Read term CPRD Medcode
(1) 42Q6.00 Partial thromboplastin time 14280
(1) 42jG.00 APTT 13844
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