Diabetes type (composite)
Name DM_type_comp
Chapter Endocrine, nutritional, metabolic/Diabetes
Type of diabetes, based on diagnostic code or, if type of diabetes not specified, on

date of diagnosis and type of medication taken. (after Mulnier, 2006)
Data Type Categorical
Data sources GPRD
Dictionaries Read
Repeated No
Valid event date range 01/01/1900 - 25/03/2010
Agreed 14.3.2011, amended 20.9.2011 (Revision 1)
Category Definition
0 not diabetic
1 T1DM
2 T2DM
If a patient has conflicting codes for Type 1 and Type 2 diabetes or no codes specifying the

type of diabetes, derive the type of diabetes as follows:

Definition of Type 1: DM = 3 OR (DM_comp = 5, aged less than 35 years at diagnosis, and

treated with 
Codelist version
Codelist authors
Creation date
Category (code) Read code Read term CPRD Medcode
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