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NEUROLOGY 2003;61:1294-1296
© 2003 American Academy of Neurology
Brief Communications

Prevalence of primary focal and segmental dystonia in Oslo

Khanh-Dung Le*, Beate Nilsen* and Espen Dietrichs, MD PhD

*These authors contributed equally to the study.
From University of Oslo Medical School (Drs. Le and Nilsen) and Department of Neurology (Dr. Dietrichs), The National Hospital, University of Oslo, Norway.

Address correspondence and reprint requests to Dr. Espen Dietrichs, Professor and Chairman, Department of Neurology, The National Hospital, University of Oslo, N-0027 Oslo, Norway; e-mail: espen.dietrichs{at}klinmed.uio.no

All patients seeking medical treatment for primary focal and segmental dystonia in Oslo, Norway, were identified in a service-based prevalence study. A total of 129 patients with focal and segmental dystonia were treated. The total prevalence was 25.4 per 100,000, but the prevalence increased with age from 4.1 (age < 30) to 58.7 (age > 70). The prevalence in subjects of European descent was 28.3 per 100,000, much higher than among first-generation immigrants of Asian and African descent.

Received November 25, 2002. Accepted in final form July 16, 2003.




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