Functional Somatic Syndromes Are Associated With Varied Postoperative Outcomes and Increased Opioid Use After Spine Surgery: A Systematic Review. — CFSMEATLAS
Functional Somatic Syndromes Are Associated With Varied Postoperative Outcomes and Increased Opioid Use After Spine Surgery: A Systematic Review.
Masood, Raisa, LeRoy, Taryn E, Moverman, Michael A et al. · Global spine journal · 2024 · DOI
Quick Summary
This review looked at seven studies involving over 40,000 patients to understand how people with fibromyalgia and other chronic pain conditions fare after spine surgery. The main finding was that patients with fibromyalgia were more likely to use opioid painkillers for longer periods after surgery and reported less improvement in their symptoms compared to those without fibromyalgia. Very little research exists on how other conditions like ME/CFS affect spine surgery outcomes.
Why It Matters
ME/CFS is recognized as a functional somatic syndrome alongside fibromyalgia, yet receives minimal research attention in surgical outcomes literature. This review highlights that patients with chronic conditions characterized by central sensitization and altered pain processing may experience different post-surgical trajectories, including higher opioid dependence risk—information critical for informed surgical decision-making and perioperative management in ME/CFS populations.
Observed Findings
Fibromyalgia was identified as a strong risk factor for long-term opioid use following spine surgery across multiple studies.
Only two studies examined patient-reported outcome measures (PROMs), yielding mixed results but suggesting possible associations with less favorable outcomes in fibromyalgia patients.
One large study (n=18,692) found higher postoperative complications in fibromyalgia patients.
Minimal research exists examining other functional somatic syndromes (IBS, chronic migraines, chronic fatigue syndrome, interstitial cystitis, multiple chemical sensitivity) in relation to spine surgery outcomes.
Inferred Conclusions
Fibromyalgia and possibly chronic migraines are associated with increased risk for prolonged postoperative opioid use and less favorable patient-reported outcomes after spine surgery.
Variation in postoperative outcomes may reflect non-identifiable organic patient factors, such as functional somatic syndromes, rather than surgical technique or immediate postoperative complications.
Evidence is insufficient to draw conclusions about ME/CFS and other functional somatic syndromes in the surgical context, representing a significant research gap.
Remaining Questions
How do ME/CFS and other functional somatic syndromes independently affect spine surgery outcomes, given they are nearly absent from the current literature?
What This Study Does Not Prove
This review does not establish causation between functional somatic syndromes and poor surgical outcomes, only association. The small number of studies examining ME/CFS specifically (likely zero in the final seven included studies) means findings cannot be directly extrapolated to ME/CFS patients. Observational study designs cannot exclude confounding variables or selection bias that might explain differential outcomes.
Tags
Symptom:PainFatigue
Method Flag:Weak Case DefinitionSmall SampleMixed Cohort
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
What mechanisms explain the association between fibromyalgia and prolonged postoperative opioid use—altered pain processing, increased pain intensity, or prescribing patterns?
Do perioperative interventions targeting central sensitization (e.g., multimodal analgesia, pre-operative education) improve outcomes in patients with functional somatic syndromes?
How do baseline symptom severity, postoperative complications, and healthcare utilization patterns differ between functional somatic syndrome populations and controls?