Suicide and multiple sclerosis: an epidemiological investigation

Area of Science:

• Neurology
• Epidemiology
• Public Health

Background:

• Multiple sclerosis (MS) is a chronic, demyelinating disease of the central nervous system.
• Understanding the mental health outcomes, including suicide risk, in MS patients is crucial for comprehensive care.

Purpose of the Study:

• To assess the risk of death by suicide among patients diagnosed with multiple sclerosis.
• To identify demographic and temporal factors associated with increased suicide risk in MS patients.

Main Methods:

• Utilized nationwide data from the Danish Multiple Sclerosis Registry (DMSR) and the Danish National Register of Cause of Death.
• Included all MS patients with disease onset or diagnosis between 1953 and 1985.
• Calculated expected suicide numbers using population death statistics, adjusted for age, sex, duration, and calendar year.

Main Results:

• Observed 53 suicides among 5525 MS patients, compared to an expected 29 suicides.
• Calculated a cumulative lifetime suicide risk of 1.95% from MS onset.
• Determined a Standard Mortality Ratio (SMR) for suicide in MS of 1.83.
• Found the highest SMR for males, patients with onset before age 30, and diagnosis before age 40.
• Noted the highest SMR within the first five years post-diagnosis.

Conclusions:

• Patients with multiple sclerosis have a significantly increased risk of suicide compared to the general population.
• Younger age at onset or diagnosis and male sex are associated with higher suicide risk in MS.
• The heightened risk of suicide in MS patients warrants targeted mental health monitoring and support, particularly in the initial years after diagnosis.