According to a presentation at the American College of Rheumatology Annual Meeting people with fibromyalgia had a median rating for cognitive function that is significantly lower than in patients with rheumatoid arthritis and reported more symptoms of impaired concentration.
According to the researchers, the largest difference between the two groups was in distraction by background noise, poor reading comprehension, difficulty following directions, trouble following conversations and difficulty concentrating.
FM patients also reported significantly more difficulty than the RA group in areas of inability to retain patterns when adding, subtracting, multiplying or dividing; inability to recall known words; frustration when speaking difficulty expressing thoughts verbally and other problems with cognition. (Helio)
Katz R, et al. Paper #1112. Presented at: American College of Rheumatology Annual Meeting. Nov. 14-19, 2014; Boston.