Anxiety and depression affect performance on the symbol digit modalities test over time in MS and other immune disorders. (July 2021)

• Record Type: Journal Article
• Authors: Marrie, Ruth Ann; Patel, Ronak; Bernstein, Charles N; Bolton, James M; Graff, Lesley A; Marriott, James J; Hitchon, Carol A; Figley, Chase R; Kornelsen, Jennifer; Fisk, John D
• Is Part Of: Multiple sclerosis. Volume 27:Number 8(2021)
• Page Start: 1284
• Page End: 1292
• Publication Date: 2021-07
• Subjects: Multiple sclerosis -- cognition -- depression -- anxiety -- symbol digit modalities test; Central nervous system -- Diseases -- Periodicals; Myelin sheath -- Diseases -- Periodicals; Inflammation -- Periodicals; Multiple sclerosis -- Periodicals; Central Nervous System Diseases -- Periodicals; Demyelinating Diseases -- Periodicals; Inflammation -- Periodicals; Multiple Sclerosis -- Periodicals; Système nerveux central -- Maladies -- Périodiques; Gaine de myéline -- Maladies -- Périodiques; Inflammation (Pathologie) -- Périodiques; Sclérose en plaques -- Périodiques; Electronic journals; 616.834005
• DOI: 10.1177/1352458520961534
• Languages: English
• ISSNs: 1352-4585

Abstract

Background: Longitudinal studies assessing depression and anxiety effects on cognition in multiple sclerosis (MS) are limited. Objective: We tested whether within-person fluctuations in symptoms of depression or anxiety over time affect cognition in persons with MS, inflammatory bowel disease (IBD), rheumatoid arthritis (RA), and a lifetime history of depression/anxiety disorders (DEP/ANX) but without an immune-mediated inflammatory diseases (IMID). Methods: We followed participants (MS: 255, IBD: 247, RA: 154, and DEP/ANX: 306) for 3 years. Annually, they completed the hospital anxiety and depression scale (HADS) and cognitive tests including the symbol digit modalities test (SDMT). We evaluated associations of elevated symptoms (scores ⩾ 11) of anxiety (HADS-A) and depression (HADS-D) with SDMT z -scores using multivariable linear models—estimating between-person and within-person effects. Results: Participants with MS performed worse on the SDMT than participants in the DEP/ANX cohort (β = −0.68; 95% CI: −0.88, −0.48). Participants with elevated HADS-A scores performed worse on the SDMT than those without elevated scores (β = −0.43; 95% CI: −0.65, −0.21), particularly those with RA. Time-varying within-person elevations in depressive symptoms were associated with worse SDMT performance (β = −0.12; 95% CI: −0.21, −0.021). Conclusions: Across persons, elevated symptoms of anxiety adversely affected information processing. Elevated symptoms of depression within-persons over time were associated with declines in information processing speed.