Results from multilevel models showed that both groups demonstrated similar diurnal patterns for objective measures of working memory, which was stable across the day, and objective processing speed, which was slowest at wake- and bed-times and fastest midday. For both groups, perceived cognitive dysfunction was highest upon waking and improved across the day; however, the HC group showed a significantly steeper rate of improvement. Perceived cognitive dysfunction corresponded only with processing speed, not working memory, and there were no group differences in these associations. Findings for ambulatory subjective and objective cognitive function in FM are generally consistent with findings from lab-based studies; the FM group demonstrated relatively worse cognitive functioning, but diurnal patterns and associations between objective/subjective functioning were similar to HC.
Kratz, A., Williams, D., Clauw, D., Whibley, D., & Sliwinski, M. (2019). (117) Characterizing Fibrofog in Daily Life: Ambulatory Cognitive Functioning in Adults with Fibromyalgia and Matched Controls. The Journal of Pain, 20(4), S5–S6. https://doi.org/10.1016/j.jpain.2019.01.036