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The British Journal of Diabetes & Vascular Disease
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The Glasgow Chart — a simple method for calculation of cardiovascular risk in type 2 diabetes

Martin Mcintyre

Department of Diabetes and Endocrinology, Royal Alexandra Hospital, Corsebar Road, Paisley, PA2 9PN, UK, martin.mcintyre{at}rah.scot.nhs.uk, Diabetes Centre, Gartnavel General Hospital, Glasgow, G12 0YN, UK

Stuart Kerr

Diabetes Centre, Gartnavel General Hospital, Glasgow, G12 0YN, UK

Brian Kennon

Diabetes Centre, Gartnavel General Hospital, Glasgow, G12 0YN, UK

Michael Small

Diabetes Centre, Gartnavel General Hospital, Glasgow, G12 0YN, UK

Aims Current guidelines for lipid lowering as primary prevention advocate a treatment threshold 10-year coronary heart disease (CHD) risk of ≥ 30%. There is a variety of methods of calculating CHD risk, of varying complexity, which incorporate different factors. We aimed to determine if different methods of CHD risk calculation give different results and if a simpler method of CHD risk calculation could be developed for type 2 diabetes.

Methods Using three recognised methods based on the Framingham equation, CHD risk was calculated for 200 consecutive patients with type 2 diabetes attending the clinic. A simple method of establishing those who should be treated with lipid-lowering agents was developed and sensitivity and specificity compared to the established method.

Results Using method 1, only 58 (29%) of the patients would be above the treatment threshold; 108 (54%) with method 2; and 140 (70%) with method 3 ( 2=68.3, p < 0.001). Using the Glasgow Chart, sensitivity and specificity would be 100% and 85% respectively if patients are identified with total cholesterol ≥ 5.0 mmol/L plus two of: 1) age ≥ 50 years; 2) blood pressure ≥ 140/80 mmHg; 3) microalbuminuria.

Conclusions It makes a significant difference which method is used to calculate CHD risk. Our simple method seems to be applicable to patients with type 2 diabetes, but requires confirmation in a larger population.

Key Words: Coronary heart disease • risk • diabetes • lipids.

The British Journal of Diabetes & Vascular Disease, Vol. 2, No. 3, 208-210 (2002)
DOI: 10.1177/14746514020020031201
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