title: Whiplash injury is more than neck pain: a population-based study of pain localization after traffic injury.
abstract: OBJECTIVE
  To describe the distribution of bodily pain and identify common patterns of pain localization after traffic injury.
  
  
  METHODS
  Cross-sectional analysis of a population-based cohort of 6481 Saskatchewan residents who were treated or filed an auto insurance claim within 30 days of traffic injury or both. The prevalence of pain in each of 13 body areas was calculated and compared with pain confined exclusively to each of these areas. Principal component analysis was used to identify the main patterns of pain localization after traffic injury.
  
  
  RESULTS
  Irrespective of pain in other areas, 86% of respondents reported posterior neck pain, 72% indicated head pain, and 60% noted lumbar back pain. Ninety-five percent of claimants reported some pain within the posterior trunk region, comprising the posterior neck, shoulder, mid-back, lumbar, and buttock areas. Only 0.4% of respondents reported posterior neck pain only. Four main patterns accounted for 60% of the variance in pain localization: 1) upper anterior trunk and upper extremity pain; 2) head, posterior neck, and upper posterior trunk pain; 3) low back pain; and 4) lower anterior trunk and lower extremity pain.
  
  
  CONCLUSIONS
  Pain after traffic injury is most commonly reported in multiple body areas; isolated neck pain is extremely rare. These results have implications for clinical management of traffic injuries and interpretation of whiplash-related trials.
authors.affiliation: Division of Health Care and Outcomes Research, Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada. cesar.hincapie@uhnresearch.ca
authors.forename: Cesar A
authors.initials: CA
authors.lastname: Hincapié
authors.forename: J David
authors.initials: JD
authors.lastname: Cassidy
authors.forename: Pierre
authors.initials: P
authors.lastname: Côté
authors.forename: Linda J
authors.initials: LJ
authors.lastname: Carroll
authors.forename: Jaime
authors.initials: J
authors.lastname: Guzmán
mesh_terms: D000063:Accidents, Traffic / Q000706:statistics & numerical data*; D000328:Adult; D001416:Back Pain / Q000175:diagnosis / Q000453:epidemiology; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D005260:Female; D006261:Headache / Q000175:diagnosis / Q000453:epidemiology; D006801:Humans; D007344:Insurance Claim Reporting; D008297:Male; D008875:Middle Aged; D019547:Neck Pain / Q000175:diagnosis* / Q000453:epidemiology*; D012525:Saskatchewan / Q000453:epidemiology; D014911:Whiplash Injuries / Q000175:diagnosis* / Q000453:epidemiology*