Pain characteristic differences between subacute and chronic back pain

Mona Lisa Chanda, Matthew D. Alvin, Thomas J. Schnitzer, A. Vania Apkarian*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Back pain is commonly classified based on duration. There is currently limited information regarding differences in the clinical features of back pain between these duration-based groupings. Here, we compared the pain characteristics of patients with subacute (SBP; pain 6-16 weeks, n = 40) and chronic back pain (CBP; pain ≥1 year, n = 37) recruited from the general population. CBP patients reported significantly higher pain intensity on the Visual Analogue Scale (VAS) compared to SBP patients. Based on this finding, we investigated group differences and their dependence on VAS for the Beck Depression Inventory (BDI), sensory and affective dimensions of the McGill Pain Questionnaire (MPQ-S and MPQ-A), Neuropathic Pain Scale (NPS), and the variability of spontaneous pain. Correction for VAS abolished significant group differences on the MPQ-S, MPQ-A and NPS. Only a significant difference in the variability of spontaneous pain was independent of VAS. Finally, whereas SBP patients displayed a higher incidence of unilateral pain radiating down the legs/buttocks, there was a shift towards more bilateral pain in CBP patients. In summary, SBP and CBP groups differ on 3 independent parameters: VAS ratings, pain location, and temporal dynamics of spontaneous pain. Perspective: The present study reports differences in the characteristics of back pain between duration-based groupings in the general population. The main outcome of the study is the demonstration that a small number of descriptors are required to characterize the difference between SBP and CBP.

Original languageEnglish (US)
Pages (from-to)792-800
Number of pages9
JournalJournal of Pain
Volume12
Issue number7
DOIs
StatePublished - Jul 2011

Keywords

  • Low back pain
  • McGill Pain Questionnaire (MPQ)
  • Visual Analogue Scale (VAS)
  • chronic back pain (CBP)
  • fractal dimension
  • pain intensity
  • subacute back pain (SBP)

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Anesthesiology and Pain Medicine

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