Alcohol 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 for alcohol abuse 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.

Otherinstructions has the eFI2 categories (zero, previous harmful, lower, higher, harmful, missing). 
All codes from GGL's alcohol abuse codelist were marked as Harmful drinking.

GGL's README:
- Terms identified by JM for Psoriasis and Dementia analysis from codelist from Kuan et al., 10.1016/S2589-7500(19)30012-3

Harmful alcohol variable
Created by Monica Iyer July 15, 2026

Uses the medcodes for the frailty alcohol variable corresponding to: previously harmful, higher risk, or harmful alcohol use.
In the analysis, this variable is coded as any medcode ever (no time restrictions).



