Red blood cell folate
Name red_cell_folate_gprd
Chapter Diseases of the blood/Haematinics
Definition
Red cell folate in nmol/L. Some values of red cell folate have the serum folate entity type (170) but a Read code for red cell folate. Values in ng/mL are converted to nmol/L. Values >= 5000 (ng/mL) or 10000 (nmol/L) are ignored.
Data Type Continuous
Data sources GPRD
Dictionaries Read
Repeated Yes
Units nmol/L
Range (min/max) 0-10000
Valid event date range 01/01/1900 - 25/03/2010
Agreed 27 Jun 2013 (Revision 1)
Implementation
IF Read code IN red_cell_folate_gprd codelist

AND enttype = IN (170, 353) THEN (

    IF data3 (units) IN (106 [ng/mL], 133 [ug/L]) 

        AND data2 (value) < 5000 AND data2 > 0 THEN red_cell_folate_gprd = data2 * 2.266

    ELSE IF data3 (units) = 110 [nmol/L]

        AND data2 (value) < 10000 AND data2 > 0 THEN red_cell_folate_gprd = data2

    ELSE red_cell_folate_gprd = Missing

)
Codelist version1
Codelist authorsAnoop Shah
Creation date27 Jun 2013
Category (code) Read code Read term CPRD Medcode
(1) 42U4.00 Red blood cell folate 13745
(1) 42U4.11 Folate - RBC 13789
(1) 42U7.00 RBC folate normal 13746
(1) 42U8.00 RBC folate low 54470
(1) 42U9.00 RBC folate borderline 57152
(1) 42UD.00 RBC folate abnormal 13749
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