Total cholesterol
Description
Identifying and cleaning total cholesterol values in EHR data.
Rules
To note: steps 1-3 below should be carried out in this order to produce a standardised end result:
- Remove values less than 0.5 and greater than 20 mmol/L as these are implausible.
- Apply additional cleaning rules based on unit codes where available.
-
If multiple values recorded on the same day for a patient, we take the mean.
-
Check to make sure the date is within the range expected given the data source and patient DOB and death dates.
Origins
- The origin of the SNOMED codelist was the Pathology Bounded Code List (PBCL).
