Lymphocyte count
Name lymphocytes_gprd
Chapter Diseases of the blood/Full blood count
Definition
Absolute lymphocyte count (not percentage) in GPRD, in units of 10^9/L. Values with missing units frequently have zero recorded, but there are very few zero values if when units are provided. It is theoretically possible to have a lymphocyte count measured as zero. It is up to the analyst to remove zero values if desired.
Data Type Continuous
Data sources GPRD
Dictionaries Read
Repeated Yes
Units 10^9 / L
Range (min/max) 0-50
Valid event date range 01/01/1900 - 25/03/2010
Agreed 19 Jun 2013 (Revision 1)
Implementation
If Read code is in the lymphocytes_gprd codelist

AND enttype = 208

AND data2 (value) < 50

AND data3 (units) IN (37 [10*9/L], 153 [10*9], 17 [/L])

THEN lymphocytes_gprd = data2
Codelist version1
Codelist authorsAnoop Shah
Creation date19 Jun 2013
Category (code) Read code Read term CPRD Medcode
(1) 42M..00 Lymphocyte count 19
(1) 42M1.00 Lymphocyte count normal 23120
(1) 42M2.00 Lymphocytosis - absolute 23121
(1) 42M3.00 Lymphocytosis - relative 37677
(1) 42M4.00 Abnormal lymphocytes 42346
(1) 42M5.00 Lymphocyte count abnormal 26950
(1) 42M8.00 Total lymphocyte count (IMM) 34551
(1) 42MZ.00 Lymphocyte count NOS 26949
(1) D40y000 Lymphocytosis 3189
(1) D40y300 Lymphopenia 11240
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