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Modic type I changes and recovery of back pain after lumbar microdiscectomy

Andreas Sørlie1, Viggo Moholdt, Kjell Arne Kvistad

  • 1Department of Neurosurgery, University Hospital of North-Norway, 9038, Tromsø, Norway. andreas.sorlie@unn.no

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
|July 31, 2012
PubMed
Abstract

Insights

Modic changes type I (MC I) on preoperative MRI scans may indicate less back pain improvement after lumbar microdiscectomy. However, smoking is the only independent risk factor for persistent back pain post-surgery.

Area of Science:

  • Neurosurgery
  • Radiology
  • Orthopedics

Background:

  • Persistent back pain after lumbar disc herniation surgery is a significant clinical challenge.
  • Modic changes (MC) on MRI are common findings in patients with low back pain.
  • The prognostic value of Modic changes type I (MC I) for surgical outcomes requires further investigation.

Purpose of the Study:

  • To determine if preoperative Modic changes type I (MC I) on MRI scans are a risk factor for persistent back pain 12 months after lumbar microdiscectomy.
  • To assess the association between MC I and surgical outcomes, including pain, function, and quality of life.
  • To identify independent predictors of persistent back pain following surgery for lumbar disc herniation.

Main Methods:

  • A cohort study included 178 patients undergoing lumbar microdiscectomy.
  • Preoperative MRI scans were reviewed by two independent neuroradiologists for Modic changes.
  • Outcomes included visual analogue scale (VAS) for pain, Oswestry disability index, EQ-5D, and employment status, analyzed using multivariate regression.

Main Results:

  • High inter-observer reproducibility was observed for Modic classification.
  • Patients with MC I showed less improvement in back pain at 12 months compared to those without MC I or with other types.
  • After adjusting for covariates, smoking emerged as the sole independent risk factor for persistent back pain, nullifying the statistical significance of MC I.

Conclusions:

  • Preoperative Modic changes type I (MC I) may be associated with reduced, though still significant, back pain improvement after microdiscectomy.
  • Smoking is a critical independent risk factor for persistent back pain following surgery for lumbar disc herniation.
  • The prognostic impact of MC I on surgical outcomes is less significant than that of smoking.

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