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Article type: Research Article
Authors: Wändell, Pera; * | Fredrikson, Stenb | Carlsson, Axel C.a; c | Li, Xinjund | Sundquist, Jand; e; f | Sundquist, Kristinad; e; f
Affiliations: [a] Division of Family Medicine and Primary Care, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Huddinge, Sweden | [b] Department of Clinical Neuroscience, Division of Neurology, Karolinska Institutet Huddinge, Stockholm, Sweden | [c] Academic Primary Health Care Centre, Stockholm Region, Stockholm, Sweden | [d] Center for Primary Health Care Research, Lund University, Malmö, Sweden | [e] Department of Family Medicine and Community Health, Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York, NY, USA | [f] Center for Community-Based Healthcare Research and Education (CoHRE), Department of Functional Pathology, School of Medicine, Matsue, Shimane University, Japan
Correspondence: [*] Correspondence to: Per Wändell, Division of Family Medicine and Primary Care, NVS Department, Karolinska Institutet, Alfred NobelsAllé 23, SE-141 83 Huddinge, Sweden. Tel.: (+46) 08 52488708; Fax: +46 8 52486809; E-mail: per.wandell@ki.se.
Abstract: Background:There is a lack of studies of Parkinson’s disease (PD) in immigrants. Objective:To study the association between country of birth and incident PD in immigrants in Sweden versus Swedish-born individuals. Methods:Study population included all adults aged 50 years and older in Sweden (n = 2775736). PD was defined as having at least one registered diagnosis of PD in the National Patient Register. The incidence of PD in different first-generation immigrant groups versus Swedish-born individuals was assessed by Cox regression, expressed as hazard ratios (HRs) and 95% confidence intervals (CI). The models were stratified by sex and adjusted for age, geographical residence in Sweden, educational level, marital status, neighbourhood socioeconomic status and co-morbidity. Results:Totally 35833 individuals had an incident diagnosis of PD (20401 men and 15432 women). Incidence rates per 100,000 person-years were for all Swedish-born 95.9 and for all foreign-born 60.1; for all men 112.3 and for all women 73.4, with a male to female ratio of 1.53, with the highest incidence rates for the group 80–84 years of age. After adjusting for potential confounders, the overall relative risk of PD was lower in immigrant men (HR 0.78; 95% CI 0.74–0.82) and women (HR 0.92; 95% CI 0.87–0.98). Among immigrant subgroups, a higher risk of PD was found among women from Finland (HR 1.13; 95% CI 1.05–1.23). Conclusion:In general, the risk of PD was lower in first-generation immigrant men and women compared to Swedish-born. The only group with a higher risk of PD was women from Finland.
Keywords: Parkinson’s disease, gender, immigrants, neighborhood, socioeconomic status
DOI: 10.3233/JPD-201962
Journal: Journal of Parkinson's Disease, vol. 10, no. 3, pp. 1133-1141, 2020
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