Characterizing the Neurobiological Mechanisms of Action of Exercise and Cognitive–Behavioral Interventions for Rheumatoid Arthritis Fatigue: A Magnetic Resonance Imaging Brain Study
Authors' conclusion
The structural connection between the L-ICC and L-PCL appears to be a dominant mechanism for how both PEPs and CBAs reduce fatigue among patients with RA.
Study context
- Population
- Subgroup of patients with rheumatoid arthritis (RA) participating in an randomized controlled trial (RCT) of personalized exercise programs (PEPs) and cognitive-behavioral approaches (CBAs) for fatigueMagnetic resonance imaging (MRI) subgroup of RCT
- Participants
- 90 participants
- Comparison
- PEPs or CBAs in addition to usual care vs usual care alone
- Outcome
- Fatigue improvement (Chalder fatigue scale)
Methodological detailsMRI brain study nested within an RCT, multimodal MRI, causal analysis framework
- MRI brain study nested within an RCT
- Multimodal MRI
- Causal analysis framework
Main finding
As reported in the abstract
Mediators of fatigue improvement (brain connectivity) · six months
Shared left isthmus cingulate cortex (L-ICC)–left paracentral lobule (L-PCL) structural connectivity, mediation effect size (ßAverage), PEPs
−0.46, SD 0.61
Shared L-ICC–L-PCL structural connectivity, mediation effect size (ßAverage), CBAs
−0.32, SD 0.47
Original publication
Characterizing the Neurobiological Mechanisms of Action of Exercise and Cognitive–Behavioral Interventions for Rheumatoid Arthritis Fatigue: A Magnetic Resonance Imaging Brain Study. Arthritis Rheumatol. Published 1 February 2024. doi:10.
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