Closed MaximMoinat closed 2 years ago
Meaning of -9xxxxx codes:
coding | meaning |
---|---|
-9999999 | empty or non-numeric value/unit |
-9000099 | associated with empty or 0 clinical code |
-9000004 | redacted - incorrect READ2 |
-9000003 | redacted - incorrect SNOMED |
-9000002 | redacted - rare occupation |
-9000001 | redacted - potentially sensitive or identifying |
Decision: only filter out 9xxx1/2/3/4.
For Deep Vein Thrombosis a lot of records were missing, Vaclav found the following:
For TPP, there is no filter on the value. So this should work (if the CTV3 mapping to SNOMED is fixed).
For EMIS, we filter any records that have a minus value. This is too stringent.
We have to investigate the different EMIS administrative codes. The following are found in the scan report: -9000004, -9000003, -9000002, -9000001, -9999999, -9000099