The moderating role of depression in the relationship between fatigue and processing speed in multiple sclerosis

Multiple Sclerosis (MS) is a chronic disease of the central nervous system that affects an estimate of 2.8 million people worldwide. Fatigue, impairments in processing speed, and depression are common symptoms reported by People with MS (PwMS). However, the relationship between these symptoms is not well understood. This study aimed to investigate this relationship and examine the (in)stability of fatigue levels over time in PwMS. The study utilized a longitudinal, retrospective cohort design and included participants diagnosed with MS (n= 141) who attended a specialized clinic in Overpelt, Belgium. Seventy-three percent of the sample was female, with a mean age of 51.88 (SD ±13.46). The average disease duration was of 16.94 years (SD ± 8.86), and a majority of the sample had the relapsing-remitting type of MS (RRMS) (n= 43). The median of disease severity, as measured by the EDSS, was of 3.50 (IQR – 3.5). The study hypothesized that fatigue levels would increase over time and that...Show moreMultiple Sclerosis (MS) is a chronic disease of the central nervous system that affects an estimate of 2.8 million people worldwide. Fatigue, impairments in processing speed, and depression are common symptoms reported by People with MS (PwMS). However, the relationship between these symptoms is not well understood. This study aimed to investigate this relationship and examine the (in)stability of fatigue levels over time in PwMS. The study utilized a longitudinal, retrospective cohort design and included participants diagnosed with MS (n= 141) who attended a specialized clinic in Overpelt, Belgium. Seventy-three percent of the sample was female, with a mean age of 51.88 (SD ±13.46). The average disease duration was of 16.94 years (SD ± 8.86), and a majority of the sample had the relapsing-remitting type of MS (RRMS) (n= 43). The median of disease severity, as measured by the EDSS, was of 3.50 (IQR – 3.5). The study hypothesized that fatigue levels would increase over time and that depression would moderate the relationship between fatigue and processing speed. Fatigue levels did not significantly change over time (p = 0.055). A significant relationship was found between fatigue and processing speed impairment (p < 0.05). However, depression did not significantly moderate this relationship (p = 0.215). These findings show that cognitive symptoms may influence each other in MS. Future research should look into the relationship of mood disorders, such as anxiety and depression, and cognitive impairment in PwMS.Show less

Leiden University Student Repository

Documents

In Collections

The moderating role of depression in the relationship between fatigue and processing speed in multiple sclerosis