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Original Article: Treatment
Road traffic accidents and diabetes: insulin use does not determine risk
K. F. Lonnen, R. J. Powell*, D. Taylor, A. C. Shore and K. M. MacLeod
Diabetes and Vascular Research, Institute of Biomedical and Clinical Science, Peninsula Medical School, Exeter, UK and  *Peninsula Research and Development Support Unit, Exeter, UK
Correspondence to: Kathryn Frances Lonnen, Gloucestershire Royal Hospital, Great Western Road, Gloucester, GL1 3NN. E-mail: kathryn.lonnen@virgin.net

Mills, KF, Powell RJ, Taylor D, Shore AC, Ellis J, Willey S. Road traffic collision rates are not increased in patients with insulin treated diabetes. Diabetic Medicine 2005; 22 (suppl. 2): 7.

Copyright Journal compilation © 2008 Diabetes UK
KEYWORDS
hypoglycaemia • diabetes • insulin • driving • accidents

Diabet. Med. 25, 578–584 (2008)

ABSTRACT

AbstractIntroductionSubjects and methodsResultsDiscussionReferences

Aims  Progressive restrictions placed on insulin-treated patients with diabetes exclude them from driving group 2 and class C1 and D1 vehicles. This reflects an assumption that an increased risk of hypoglycaemia in these patients will cause road traffic accidents. These restrictions have been implemented without any consistent evidence that this is the case. The aim of the study was therefore to investigate whether the rate of road traffic collisions in insulin-treated patients was higher than that of the non-diabetic population using a population register-based study.

Methods  A historical cohort study combined information from the Devon and Cornwall Constabulary database on road traffic collisions with the district wide retinal screening database, to provide an anonymized matched database of road traffic collisions in the diabetic population. Accident rates were calculated in the diabetic population and compared to rates in the non-diabetic population using relative risks.

Results  The estimated overall annual accident rate for the non-diabetic population was 1469 per 100 000 vs. 856 per 100 000 for the diabetic population as a whole (Chi-squared, P < 0.001). On stratification of the groups by age, within the insulin-treated group there was no significant difference in the accident rate compared to the non-diabetic population, with relative risks between 0.51 [confidence interval (CI) 0.25–1.05] and 1.13 (CI 0.88–1.46).

Conclusions  Our findings suggest that insulin-treated patients as a group do not pose an increased risk to road safety. They reiterate the need for an individualized risk-based assessment when considering driving restrictions.


Accepted 15 November 2007

DIGITAL OBJECT IDENTIFIER (DOI)
10.1111/j.1464-5491.2008.02409.x About DOI

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