• Cesar A Hincapié, J David Cassidy, Pierre Côté, Linda J Carroll, and Jaime Guzmán.
• Division of Health Care and Outcomes Research, Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada. cesar.hincapie@uhnresearch.ca
• J. Occup. Environ. Med. 2010 Apr 1;52(4):434-40.

ObjectivesTo describe the distribution of bodily pain and identify common patterns of pain localization after traffic injury.MethodsCross-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.ResultsIrrespective 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.ConclusionPain 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.

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