Incidence of Parkinson's disease and parkinsonism in northern Sweden: a population-based study

Movement Disorders : Official Journal of the Movement Disorder Society
Jan LinderLars Forsgren

Abstract

The differential diagnosis of parkinsonian disorders is difficult, especially early in the course of the diseases. The clinical subtypes of Parkinson's disease (PD) have not so far been described in newly diagnosed patients. We present a prospective incidence cohort study of patients with idiopathic parkinsonian syndromes in the Umeå region in northern Sweden identified over a 4-year period. The clinical diagnoses were re-evaluated at follow-up visits at 12 months. We found 138 patients with parkinsonism: 112 PD, 12 multiple system atrophy with predominant parkinsonism (MSA-P), six progressive supranuclear palsy (PSP) and eight unclassifiable patients. The crude incidences for all age ranges per 100,000 were: PD 19.7 (95% confidence interval 16.1-23.3); MSA-P 2.1 (1.1-3.7); PSP 1.1 (0.4-2.4); idiopathic parkinsonism 24.3 (20.2-28.4). Age-standardized to the average Swedish population 2004-2007: PD 22.5 (18.3-26.7); MSA-P 2.4 (1.2-4.2); PSP 1.2 (0.4-2.6); idiopathic parkinsonism 27.5 (22.9-32.1). The crude annual incidence rate for PD, with exclusion of patients with normal dopamine receptor uptake (FP-CIT-SPECT), was 18.8 per 100,000 (95% confidence interval 15.2-22.4), age-adjusted to the average Swedish population 2004 to 200...Continue Reading

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Citations

Aug 27, 2013·Journal of Neurology·Niklas LenfeldtLars Forsgren
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