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Low back pain after traffic collisions: a population-based cohort study
J David Cassidy1, Linda Carroll, Pierre Côté
1Epidemiology Program and the Alberta Centre for Injury Control and Research, Department of Public Health Sciences, University of Alberta, Edmonton, Canada. dcassidy@ualberta.ca
Spine
|May 28, 2003
Summary
The incidence of low back pain claims after traffic collisions decreased following a change to a no-fault insurance system. Recovery times also improved, highlighting the impact of compensation systems and biopsychosocial factors on prognosis.
Area of Science:
- Occupational health
- Trauma and injury research
- Health economics
Background:
- Low back pain is a prevalent and expensive occupational injury.
- Collision-related low back pain frequency and recovery are less understood.
- Insurance compensation systems can influence injury claims and outcomes.
Purpose of the Study:
- To assess the incidence and prognosis of collision-related low back pain.
- To compare outcomes before and after a shift in the insurance compensation system.
Main Methods:
- A population-based incidence cohort study of 4473 low back pain claims in Saskatchewan.
- Analysis of claim incidence and time to closure before (tort system) and after (no-fault system) an insurance change on January 1, 1995.
- Development of prognostic models using baseline and follow-up data.
Main Results:
- Six-month claim incidence reduced from 256 to 176 per 100,000 post-insurance change.
- Median time to claim closure decreased significantly, from 505 days (tort) to 210-216 days (no-fault).
- Faster closure linked to improved pain/function and no depression; delays associated with high pain, female gender, employment, concentration issues, and lawyer involvement.
Conclusions:
- Collision-related low back pain is common, with recovery often prolonged.
- The type of insurance compensation system significantly impacts low back pain incidence and prognosis.
- Biopsychosocial factors play a critical role in determining recovery outcomes for low back pain.