Activity limitation 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's README:
- Generated by GGL and reviewed by CWG
- Used CPRD AURUM Medical Browser, Version March 2024


Notes on process: 
- Started with Julian Matthewman Aurum "translation" of Clegg codelist
- Used terms in Clegg codelist to search on "term" and identify additional codes 

Notes on inclusion/exclusion criteria: 
- Included historic ("history of") codes as trying to capture frailty as a state rather than incidence of components
- Excluded "family history" codes
- Excluded "score" codes which dont clearly indicate result of score

