Smoking 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. Categorised all codes as Nonsmoker, current smoker, ex smoker
4. New codes and categories reviewed by CWG May 2026

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

GGL readme
adapted by Julian Matthewman (for this proejct: https://github.com/julianmatthewman/psoriasis_dementia_public) from https://datacompass.lshtm.ac.uk/id/eprint/3472/ https://doi.org/10.17037/DATA.00003472