Depressive Symptoms in Multiple Sclerosis: Links to Body Composition, Physical Activity, and Functional Ability

BACKGROUND In patients with multiple sclerosis, depression and its associated symptoms are factors that reduce the health-related quality of life can affect the course of the disease and the patient's compliance with therapeutic recommendations, or may even increase the risk of suicide. This study aimed to determine the relationship between body composition, motor function of limbs, physical activity, and the occurrence of depressive symptoms in patients with multiple sclerosis. MATERIAL AND METHODS The study group included 110 patients - 84 women (76.4%) and 26 men (23.6%) - with multiple sclerosis and with or without depression. Disability status was assessed using the EDSS scale. Depressive symptoms were recognized based on the Beck Depression Inventory-II, while motor function was determined with the 9-Hole Peg Test and Timed 25-Foot Walk test. Accelerometers were used to evaluate physical activity of patients. Statistical analysis of collected data was performed using logistic regression. RESULTS Depressive symptoms (BDI-II score ≥14) were observed in 24.55% of the participants. MS patients with and without depression symptoms differed significantly in terms of fat mass, T25-FW, and 9-HPT-dominant hand. Multivariate regression analyses demonstrated that increased adiposity (OR=1.09; 95% CI=1.02-1.16; P=.008; and decreased motor ability of the upper limb, both dominant (OR=1.07; 95% CI=1.01-1.15; P=.043) and non-dominant one (OR=1.10 95% CI 1.01-1.18; P=.025) were associated with a higher risk of depression. The differences in physical activity and T25-FW between groups were statistically insignificant. CONCLUSIONS The severity of depression symptoms was related to higher body mass and decreased functional ability of the upper limbs in patients with MS. Thus, a detailed evaluation of the patient's upper-limb function should constitute an integral part of motor function assessment of patients with MS.