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Elaine C. Wirrell, MD, FRCPC; Peter R. Camfield, MD, FRCPC; Carol S. Camfield, MD, FRCPC; Joseph M. Dooley, MD, FRCPC; Kevin E. Gordon, MD, MS, FRCPC

Arch Neurol. 1996;53(9):929-932.

Abstract
Objectives
To determine if young adults with a history of typical absence epilepsy (AE) in childhood have a greater risk of accidental injury than controls with juvenile rheumatoid arthritis (JRA). To assess the nature and severity of these injuries.

Methods
All patients with AE or JRA diagnosed between 1977 and 1985, who were 18 years or older at the onset of the study, were identified from review of pediatric electroencephalographic records for the province of Nova Scotia (AE) or review of the medical records database at the only tertiary care pediatric center for the province (JRA). Fifty-nine (86%) of 69 patients with AE and 61 (80%) of 76 patients with JRA participated in an interview in 1994 or 1995, assessing nature, severity, and treatment of prior accidental injuries. Patients with AE were further questioned about injuries sustained during an absence seizure.

Results
Sixteen (27%) of 59 patients with AE reported accidental injury during an absence seizure, with the risk of injury being 9% per person-year of AE. Most injuries (81%) occurred during anti-epileptic drug therapy. Although the majority of injuries did not require treatment, 2 (13%) of 16 patients required minor treatment and 2 (13%) of 16 were admitted to hospital. The risk of accidental injury resulting from an absence seizure in person-years at risk was highest in juvenile myoclonic epilepsy (45%), moderate in juvenile AE (14%), and lowest in childhood AE (3%). Patients with AE had a greater number of overall accidental injuries than those with JRA (P<.04), but these differences were particularly marked for bicycle (P<.003) and car accidents (P<.05) and for mild head injuries (P=.05).

Conclusions
Accidental injury is common in AE and usually occurs after anti-epileptic drug treatment is started. Injury prevention counseling is indicated both at diagnosis and follow-up. Bicycle accidents pose a special risk and helmet use should be mandatory.

Author Affiliations
From the IWK-Grace Health Centre and Dalhousie University, Halifax, Nova Scotia.

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