Prevalence study of primary dystonia in Iceland

Hilmir Asgeirsson, Finnbogi Jakobsson, Haukur Hjaltason, Helga Jonsdottir, Sigurlaug Sveinbjornsdottir*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)


In Iceland, the crude prevalence for all types of primary dystonia was 37.1/105 (confidence interval, 30.4-44.9). Focal dystonia had the highest prevalence (31.2/105), followed by segmental (3.1/105), multifocal (2.4/105) and generalized dystonia (0.3/105). Cervical dystonia was the most common focal dystonia (11.5/105), followed by limb dystonia (8.0/105), laryngeal dystonia (5.9/105), blepharospasm (3.1/105), and oromandibular dystonia (2.8/105). 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.

Original languageEnglish
Pages (from-to)293-298
Number of pages6
JournalMovement Disorders
Issue number3
Publication statusPublished - Mar 2006

Other keywords

  • Dystonia
  • Epidemiology
  • Idiopathic
  • Prevalence
  • Primary


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