Self harm codelist creation

Author: Monica Iyer
Last updated: May 14, 2026
Data source: CPRD Aurum

Variable created as part of eFI2

1. Mapped the given eFI2 SNOMED codes to medcodes using March 2026 codebrowswer
2. Merged resulting codelist with GGL's previously-generated codelist from infections/mental health study (2025)
3. De-duplicated
4. New codes reviewed by CWG May 2026

The columns Otherinstructions, TimeConstraintyears, and AgeLimit refer to additional criteria based on eFI2.

GGL readme
Generated by SLC,and checked against previous codelist by HF and AL, reviewed by CWG(Feb 25)

The definition used has come from the HDRUK Datamind phenotype for self-harm: https://phenotypes.healthdatagateway.org/phenotypes/PH936/version/3576/detail/