Metadata

Name LDL Cholesterol
Type Biomarker
Group Biomarker
Data Sources
Clinical Terminologies Read Version 2
Codelists
Valid Event Data Range 01/01/1999 - 01/07/2016
Sex Female
Male
Authors Shah A
Agreement Date 23 Nov 2012
Version (UUID) Revision 1 (XqKwYhySZhoQKu8gqeUtdr)

Primary Care

In the Clinical Practice Research Datalink (CPRD, primary care data) we extracted Low Density Liporotein (LDL) measurements using the structured data component of the test CPRD table (entity type 177 and 288) combined with the Read terms below.

Measurements were extracted from the data2 field and units from the data3 field. We extracted all values recorded in mmol/L (SUM lookup 96) or mg/dL (SUM lookup 82) and filtered out values below 0 or above 50 mmol/L. Where multiple measurements were present in a single consultation (identified by the consid identifier) we calculated the average.

Plasma measurements

´╗┐Read code Read term
44d4.00 Plasma random LDL cholesterol level
44dB.00 Plasma LDL cholesterol level

Serum measurements

´╗┐Read code Read term
44P6.00 Serum LDL cholesterol level
44PE.00 Serum random LDL cholesterol level
44PI.00 Calculated LDL cholesterol level