Psychiatric comorbidity is associated with disability progression in multiple sclerosis

Area of Science:

• Neurology
• Psychiatry
• Epidemiology

Background:

• Comorbidity significantly impacts multiple sclerosis (MS) disability.
• Investigating the link between psychiatric conditions and MS progression is crucial for patient outcomes.

Purpose of the Study:

• To examine the association between psychiatric comorbidity and disability progression in a large, multiclinic multiple sclerosis population.
• To determine if conditions like depression, anxiety, or bipolar disorder affect the Expanded Disability Status Scale (EDSS) scores in MS patients.

Main Methods:

• Retrospective cohort study utilizing prospectively collected data from Canadian health administrative databases.
• Identified individuals with MS and psychiatric comorbidities (depression, anxiety, bipolar disorder) using validated algorithms.
• Employed multivariable linear regression with generalized estimating equations to analyze the association between psychiatric comorbidity and EDSS scores.

Main Results:

• A cohort of 2,312 adult-onset MS patients was followed for a mean of 10.5 years.
• 35.8% of patients met criteria for a mood or anxiety disorder.
• Psychiatric comorbidity was significantly associated with higher EDSS scores (β = 0.28, p = 0.0002), particularly in women.

Conclusions:

• Psychiatric comorbidities are prevalent in MS and are associated with increased neurological disability.
• Optimizing the management of psychiatric conditions may be a viable strategy to mitigate disability progression in multiple sclerosis.
• Further research into integrated care models for MS patients with psychiatric comorbidities is warranted.