Environmental risk factors for amyotrophic lateral sclerosis: a case-control study in Canada and France.

TitleEnvironmental risk factors for amyotrophic lateral sclerosis: a case-control study in Canada and France.
Publication TypeJournal Article
Year of Publication2022
AuthorsBeaudin, M, Salachas, F, Pradat, P-F, Dupré, N
JournalAmyotroph Lateral Scler Frontotemporal Degener
Pagination1-9
Date Published2022 Jan 27
ISSN2167-9223
Abstract

: To evaluate the association between amyotrophic lateral sclerosis (ALS) and potential environmental risk factors, especially head traumas and pesticides, in two populations from Canada and France.: A case-control study was performed in tertiary-care centers. Consecutive ALS cases were recruited along with a control group from the same age distribution and region. Participants answered a phone-administered questionnaire. Head trauma exposure was censored at age of symptom onset, and a sensitivity analysis considering old head traumas that occurred more than 3 years before onset was performed. Univariate and multivariate logistic regression were used to estimate odds ratios (ORs) and their 95% confidence intervals (CIs).: A total of 404 ALS cases and 381 controls completed the questionnaire. Previous head trauma was more frequently reported by cases (adjusted OR 1.50 (1.05-2.18)) with a dose-response relationship. This association was driven by a strong effect in men (adjusted OR 2.06 (1.22-3.55)) and was consistent for old traumas, but there was no association in women. For pesticides, a previous high-risk occupation was associated with ALS (adjusted OR 2.08 (1.36-3.24)), although reported occupational exposure to pesticides was not statistically significant in the multivariate model (adjusted OR 1.67 (0.97-2.97)). Past electrocution was associated with ALS (adjusted OR 1.79 (CI 1.13-2.87)), especially spinal-onset ALS. Residential exposure to pesticides, neck trauma, and welding were not associated with ALS.: Head trauma is a risk factor for ALS in men only. Previous occupation at high risk for pesticides exposure and electrocution are also risk factors for ALS.

DOI10.1080/21678421.2022.2028167
Alternate JournalAmyotroph Lateral Scler Frontotemporal Degener
PubMed ID35084274