Effect of comorbidity on mortality in multiple sclerosis

Area of Science:

• Neurology
• Epidemiology
• Public Health

Background:

• Multiple sclerosis (MS) is a chronic neurological disease impacting survival.
• Understanding the interplay between MS, comorbidity, and mortality is crucial for patient care.

Purpose of the Study:

• To compare survival rates between individuals with MS and a matched general population cohort.
• To assess how comorbidities affect survival in both MS patients and the general population.

Main Methods:

• Population-based administrative data used to identify 5,797 MS patients and 28,807 matched controls.
• Cox proportional hazards regression analyzed the association between comorbidity and mortality, with adjustments for relevant factors.
• Causes of death were compared between the MS and control groups.

Main Results:

• Median survival was 75.9 years for MS patients versus 83.4 years for controls.
• MS was linked to a 2-fold increased risk of death (aHR 2.40).
• Comorbidities like diabetes and heart disease increased mortality risk in both groups, but to a lesser extent in MS patients.

Conclusions:

• Survival remains shorter for individuals with MS compared to the general population.
• Comorbidity is associated with increased mortality risk within the MS population.
• Comorbidity does not disproportionately elevate mortality risk in MS patients relative to controls.