Serum folate
Name serum_folate_gprd
Chapter Diseases of the blood/Haematinics
Definition
Serum folate in nmol/L. Values in ng/mL are multiplied by 2.266.

Values of 0 or >= 50 (ng/mL) or 100 (nmol/L) are considered to be errors.
Data Type Continuous
Data sources GPRD
Repeated Yes
Units nmol/L
Range (min/max) 0-100
Valid event date range 01/01/1900 - 25/03/2010
Agreed 27 Jun 2013 (Revision 1)
Implementation
IF Read code IN serum_folate_gprd codelist

AND enttype = 170 THEN (

    IF data3 [units] IN (133 [ug/L], 106 [ng/mL], 83 [mg/L]) 

        AND data2 [value] < 50 AND data2 > 0 THEN serum_folate_gprd = data2 * 2.266

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

        AND data2 [value] < 100 AND data2 > 0 THEN serum_folate_gprd = data2

    ELSE serum_folate_gprd = Missing

)
Codelist version1
Codelist authorsAnoop Shah
Creation date27 Jun 2013
Category (code) Clinical code Clinical term Datasource lookup
(1) 42U..00 Blood folate 3431
(1) 42U..11 Folate blood level 13747
(1) 42U1.00 Serum folate normal 19762
(1) 42U2.00 Serum folate low 15898
(1) 42U3.00 Serum folate borderline 54061
(1) 42U5.00 Serum folate 13748
(1) 42U6.00 Whole blood folate 33283
(1) 42UA.00 Whole blood folate normal 47173
(1) 42UB.00 Whole blood folate low 44125
(1) 42UE.00 Plasma folate level 23109
(1) 42UZ.00 Blood folate NOS 29203
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