Depression in ALS in a large self-reporting cohort

Area of Science:

• Neurology
• Psychiatry
• Clinical Research

Background:

• Depression is a significant comorbidity in neurodegenerative diseases.
• Understanding depression's impact in amyotrophic lateral sclerosis (ALS) is crucial for patient care.

Purpose of the Study:

• To investigate the prevalence, associations, longitudinal course, and survival impact of depression in a large cohort of ALS patients.
• To identify factors associated with depression in ALS.
• To examine changes in depression over time in ALS patients.

Main Methods:

• Observational study of 1,067 ALS patients over 8 years.
• Utilized the Patient Health Questionnaire-9 (PHQ-9) for depression assessment.
• Employed Cox proportional hazard models, linear models, mixed effects models, and logistic regression for analysis.

Main Results:

• Initial depression (PHQ-9 ≥ 10) was present in approximately 33% of patients.
• Higher initial depression scores significantly predicted mortality (HR 1.041 per point).
• Depression was associated with poorer quality of life and linked to advanced disease and pseudobulbar affect; worsening depression was not observed during follow-up.

Conclusions:

• Depression is prevalent in ALS and impacts survival and quality of life.
• Despite motor progression, depression severity did not worsen over time in this cohort.
• Treatment of depression in ALS is recommended, though its effect on survival remains uncertain.