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Parkinson's Disease, Multiple Sclerosis and Changes of Residence in Alberta

Published online by Cambridge University Press:  02 December 2014

Nikolaos Yiannakoulias
The Public Health Surveillance and Environmental Health, Alberta Health & Wellness School of Geography and Earth Sciences, McMaster University, Hamilton, ON, Canada
Donald P. Schopflocher
The Public Health Surveillance and Environmental Health, Alberta Health & Wellness Department of Public Health Sciences, University of Alberta Department of Community Health Sciences, University of Calgary, Alberta Institute of Health Economics, Alberta Health & Wellness
Sharon A. Warren
Multiple Sclerosis Patient Care and Research Clinic, University of Alberta
Lawrence W. Svenson
The Public Health Surveillance and Environmental Health, Alberta Health & Wellness Department of Public Health Sciences, University of Alberta Department of Community Health Sciences, University of Calgary, Alberta
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Our objective is to examine how persons diagnosed with Multiple Sclerosis (MS) and Parkinson's disease (PD) change residence following disease onset. We hypothesize that persons choose to change residence (locally or regionally) in different ways depending on whether or not they have been diagnosed with MS/PD. We also estimate the effects of residence change on measures of disease prevalence made at several different levels of geography.


Using fee-for service and hospitalization data, we identify cases of MS and PD between 1994 and 2004. Both of these case groups are matched to controls based on age, sex, socioeconomic status and municipality of residence. We tabulate and compare the changes of residence among persons in the case and control groups. We also use these data to estimate the effects that changes in residence have on disease prevalence at three different levels of geography.


Both MS and PD patients were more likely to change residence following disease onset compared to groups of matched controls (p<=0.001). Most changes of residence occur within the same municipality. The total magnitude of these changes is small, however, and is unlikely to affect estimates of disease prevalence; over our study period, the largest change in geographical prevalence estimates due to individual changes in residence was about 1%.


Persons diagnosed with MS and PD both have mobility characteristics that differ from those of their respective control groups, and in general, are more likely to move to or between Edmonton and Calgary, and less likely to move out of province. However, the balance of mobility characteristics of persons with PD and MS appear unlikely to greatly affect the patterns observed on maps of disease prevalence.



Maladie de Parkinson, sclérose en plaques et changements de résidence en Alberta.


L'objectif de cette étude était d'examiner comment les individus chez qui on a posé un diagnostic de sclérose en plaques (SEP) et de maladie de Parkinson (MP) changent de lieu de résidence après le début de la maladie. Notre hypothèse était que les individus choisissent de changer de lieu de résidence (localement ou régionalement) de différentes façons selon qu'ils sont atteints de la SEP ou de la MP. Nous estimons également les effets du changement de lieu de résidence sur la prévalence à différents niveaux géographiques. Méthodes : Nous avons identifié les cas de SEP et de MP entre 1994 et 2004 au moyen des données de paiement à l'acte et d'hospitalisation. Ces deux groupes de patients ont été appariés à des témoins selon l'âge, le sexe, le statut socioéconomique et la municipalité de résidence. Nous avons classifié et comparé les changements de lieu de résidence des individus atteints et des témoins. Nous avons également utilisé ces données pour estimer les effets que les changements de lieu de résidence ont sur la prévalence de la maladie à trois niveaux géographiques différents. Résultats : Les patients atteints de SEP et de MP étaient plus susceptibles de changer de lieu de résidence après le début de la maladie par rapport aux témoins (p ² 0,001). La plupart changeaient de résidence à l'intérieur de la même municipalité. Cependant, ces changements sont peu nombreux et sont peu susceptibles de modifier les estimés de prévalence de la maladie. Pendant notre étude, le changement le plus considérable dans les estimés de prévalence géographique dû changements individuels de lieu de résidence était d'environ 1%. Conclusion : Les individus chez qui on pose un diagnostic de SEP ou de MP ont des caractéristiques de mobilité qui diffèrent de celles de leur groupe témoin respectif et, en général, sont plus susceptibles de déménager à ou entre Edmonton et Calgary et moins susceptibles de déménager hors de la province. Cependant, il semble peu probable que la balance des caractéristiques de mobilité des individus atteints de MP ou de SEP influence de façon importante la cartographie de la prévalence de ces maladies.

Original Articles
Copyright © The Canadian Journal of Neurological 2007


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