Amyotrophic Lateral Sclerosis and Exposure to Environmental Toxins: An Australian Case-Control StudyMorahan J.M. · Pamphlett R.
Department of Pathology, University of Sydney, Sydney, Australia
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It has been suggested that environmental toxins could be risk factors for sporadic amyotrophic lateral sclerosis (SALS). We therefore analysed epidemiological data on 179 SALS cases and 179 age-, ethnicity- and sex-matched controls in Australia using self-reporting questionnaires. SALS was associated with solvent/chemical exposure (OR = 1.92, 95% CI: 1.26–2.93), overall herbicide/pesticide exposure (OR = 1.57, 95% CI: 1.03–2.41) and industrial herbicide/pesticide exposure (OR = 5.58, 95% CI: 2.07–15.06). Exposure to herbicides/pesticides showed a dose-response effect. All positive findings were more statistically significant in males. These findings support those from northern hemisphere studies, indicating that environmental toxins can be risk factors for SALS.
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