Incidence of Low Back Pain and Pre-Placement X-Ray Screening

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Abstract
The primary purpose of preplacement back X-ray screening is to reduce the incidence of low back problems. This study was designed to address the specific question of whether or not this objective is achieved, without directly looking at the predictive value of radiological abnormalities of the lumbar spine. Two retrospective cohorts of steelworkers were identified: 1 group hired before, and 1 after, introduction of back X-rays into an otherwise identical preplacement medical examination. The 2 cohorts were stratified by age and work activity, and by use of a modified life table method were followed for 12 yr. All health incidents, modified work, lost time or permanent job changes were noted. Analysis revealed no statistically significant differences between cohorts for the parameters studied. The inclusion of low back X-ray screening into a comprehensive preplacement medical examination had no significant effect on the subsequent incidence of low back pain in the cohort of steelworkers studied.

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