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Associations betwee...
Associations between autoimmune diseases and amyotrophic lateral sclerosis : a register-based study
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- Cui, Can (author)
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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- Longinetti, Elisa (author)
- Karolinska Institutet
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- Larsson, Henrik, 1975- (author)
- Örebro universitet,Institutionen för medicinska vetenskaper,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
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- Andersson, John (author)
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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- Pawitan, Yudi (author)
- Karolinska Institutet
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- Piehl, Fredrik (author)
- Karolinska Institutet
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- Fang, Fang (author)
- Karolinska Institutet
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(creator_code:org_t)
- 2020-12-17
- 2021
- English.
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In: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration. - : Informa Healthcare. - 2167-8421 .- 2167-9223. ; 22:3-4, s. 211-219
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Abstract
Subject headings
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- Objective: To assess the associations of 43 autoimmune diseases with the subsequent risk of ALS and further evaluate the contribution of familial confounding to these associations.Methods: We conducted a nationwide register-based nested case-control study including 3561 ALS patients diagnosed during 1990-2013 in Sweden and 35,610 controls that were randomly selected from the general population and individually matched to the cases on age, sex, and county of birth. To evaluate the contribution of familial factors on the studied association, we additionally studied the first-degree relatives (siblings and children) of ALS patients and their controls.Results: Patients with ALS had a 47% higher risk of being previously diagnosed with autoimmune disease (OR 1.47, 95% confidence interval [CI] 1.31-1.64), compared with controls. A positive association was noted for several autoimmune diseases, including myasthenia gravis, polymyositis or dermatomyositis, Guillain-Barre syndrome, type 1 diabetes diagnosed younger than 30 years, multiple sclerosis, and hypothyreosis. The increased risk of any autoimmune disease was greatest during the year before ALS diagnosis, likely due to misdiagnosis. A statistically significantly increased risk was also noted during 2-5 years, but not earlier, before ALS diagnosis. First-degree relatives of ALS patients had however no increased risk of autoimmune diseases compared with first-degree relatives of controls.Conclusions: Although it is difficult to completely remove the potential effects of misdiagnosis, there is likely a positive association between autoimmune disease (such as type 1 diabetes and multiple sclerosis) and ALS, which is not fully explained by shared familial confounding factors.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Gastroenterologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Gastroenterology and Hepatology (hsv//eng)
Keyword
- Amyotrophic lateral sclerosis
- association
- autoimmune diseases
- inflammation
- nested case-control study
Publication and Content Type
- ref (subject category)
- art (subject category)
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