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Medical History and Multiple Sclerosis: A Population-Based Incident Case-Control Study
Ibrahim Abdollahpour1, Alexis A Lizarraga2, Saharnaz Nedjat3
1Department of Epidemiology, School of Public Health, Arak University of Medical Sciences, Arak, Iran, ebrahemen@gmail.com.
Background:
Consistent evidence regarding the potential role of medical history in multiple sclerosis (MS) etiology is lacking.
Objective:
The association of medical history variables, that is, head injury and 9 autoimmune diseases with MS onset was investigated.
Methods:
This was a population-based incident case-control study in Iran with 547 incident cases and 1,057 general population controls (August 7, 2013 - February 17, 2015). Multiple logistic regression models were used for estimating the adjusted ORs.
Results:
Lifetime history of head trauma was not significantly associated with risk of MS after adjustment for well-known confounders (OR 1.24 [0.93-1.66, p = 0.14]). Similarly, there was no statistically significant association between cumulative numbers of head injury and MS (OR 1.02 [0.90-1.15, p = 0.79]). A history of autoimmune disease did not increase the risk of MS (p > 0.1). Similarly, the cumulative number of autoimmune diseases is not significantly associated with the risk of MS (p > 0.70).
Conclusion:
Lifetime histories of head trauma as well as 9 investigated autoimmune diseases are not associated with increased risk of MS.
Insights
Medical history, including head injuries and autoimmune diseases, does not appear to increase the risk of developing multiple sclerosis (MS). This population-based study found no significant association between these factors and MS onset.
Area of Science:
- Neurology
- Epidemiology
- Immunology
Background:
- Evidence linking medical history to multiple sclerosis (MS) etiology is inconsistent.
- Investigating specific medical history factors like head injury and autoimmune diseases in relation to MS is crucial for understanding its causes.
Purpose of the Study:
- To investigate the association between head injury, autoimmune diseases, and the onset of multiple sclerosis (MS).
- To determine if a history of head trauma or autoimmune conditions influences MS risk.
Main Methods:
- A population-based incident case-control study was conducted in Iran.
- Data included 547 MS cases and 1,057 general population controls.
- Multiple logistic regression models were used to estimate adjusted odds ratios (ORs).
Main Results:
- Lifetime history of head trauma was not significantly associated with MS risk (OR 1.24 [0.93-1.66]).
- Cumulative head injuries also showed no significant association with MS (OR 1.02 [0.90-1.15]).
- A history of autoimmune diseases did not increase MS risk (p > 0.1), nor did the cumulative number of autoimmune diseases (p > 0.70).
Conclusions:
- Lifetime head trauma history is not associated with an increased risk of multiple sclerosis.
- Investigated autoimmune diseases do not appear to elevate the risk of developing MS.
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