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Prevalence study of primary dystonia in Iceland

✍ Scribed by Hilmir Asgeirsson; Finnbogi Jakobsson; Haukur Hjaltason; Helga Jonsdottir; Sigurlaug Sveinbjornsdottir

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
64 KB
Volume
21
Category
Article
ISSN
0885-3185

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✦ Synopsis

Abstract

In Iceland, the crude prevalence for all types of primary dystonia was 37.1/10^5^ (confidence interval, 30.4–44.9). Focal dystonia had the highest prevalence (31.2/10^5^), followed by segmental (3.1/10^5^), multifocal (2.4/10^5^) and generalized dystonia (0.3/10^5^). Cervical dystonia was the most common focal dystonia (11.5/10^5^), followed by limb dystonia (8.0/10^5^), laryngeal dystonia (5.9/10^5^), blepharospasm (3.1/10^5^), and oromandibular dystonia (2.8/10^5^). The male:female ratio for all patients was 1:1.9 (P = 0.0007), and females outnumbered males in all subtypes except oromandibular dystonia. Mean age of onset for all patients was 42.7 years (range, 3–82 years). This prevalence of primary dystonia is higher than in most reported studies, possibly because of more complete ascertainment but the relative frequencies of dystonia subtypes is similar. © 2005 Movement Disorder Society

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