Trauma and amyotrophic lateral sclerosis: a case-control study from a population-based registry.

Area of Science:

• Neuroscience
• Epidemiology

Background:

• Published reports on the association between amyotrophic lateral sclerosis (ALS) and trauma are conflicting.
• A large-scale case-control study is needed to clarify this relationship.

Purpose of the Study:

• To investigate the association between antecedent trauma and the risk of developing amyotrophic lateral sclerosis (ALS).

Main Methods:

• A population-based case-control study was conducted in Italy.
• Cases were newly diagnosed ALS patients; controls were matched for age, sex, and residence.
• Traumatic events were recorded with details on type, timing, and severity; risks were assessed using odds ratios (ORs) with 95% confidence intervals (CIs).

Main Results:

• A history of one or more traumatic events was reported by 59.7% of ALS cases versus 50.7% of neurological controls and 47.5% of non-neurological controls (P < 0.01).
• The overall odds ratio for ALS associated with any trauma was 1.63 (95% CI 1.25-2.14).
• Increased risks were observed for multiple (3+) traumatic events (OR 3.07) and severe traumatic events (OR 2.44), with significance maintained for events occurring 5-10 years prior to onset.

Conclusions:

• Antecedent trauma, particularly repeated or severe trauma, may represent a risk factor for amyotrophic lateral sclerosis (ALS).
• Findings suggest a potential link between physical injury and neurodegenerative disease onset.