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One hundred seventy-four case patients and 348 control subjects participated in the study.Physical activity was not significantly different between case patients and controls-whether at work,leisure time or both combined,and whether during a person's lifetime(from 10 years before reference date back to age 15 years)or during specific decades before reference date.An exception was that case patients reported having participated unorganized sports in high school slightly more frequently than control subjects(odds ratio,1.52l;95%confidence interval,1.03-2.25).A history of physical activity has little,if any,effect on the risk of ALS. |
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