The prevalence of primary dystonia in the general community.
The prevalence of primary dystonia was assessed in a random population sample of individuals aged 50 and over in Bruneck, South Tyrol. The diagnosis of primary dystonia was confirmed by videotaped review. Primary dystonia was present in 6 of 707 cases resulting in a prevalence rate of 732 per 100,000 (95% CI 319-1,564) in the general population aged 50 and over. Only two cases (33%) had been previously diagnosed. These results indicate that the true prevalence of primary dystonia is significantly higher than published rates.
Müller
J
J
University Hospital of Neurology, Innsbruck, Austria.
Kiechl
S
S
Wenning
G K
GK
Seppi
K
K
Willeit
J
J
Gasperi
A
A
Wissel
J
J
Gasser
T
T
Poewe
W
W
D000328:Adult; D000368:Aged; D016001:Confidence Intervals; D020821:Dystonic Disorders / Q000175:diagnosis / Q000453:epidemiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007558:Italy / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies