Radiographic analysis of lumbar spine for low-back pain in the general population.

We sought to demonstrate a correlation between low-back pain (LBP) and the plain radiographic findings of the lumbar spine in the general population based on an analysis of 838 persons, 387 of whom presented with complaints of low-back pain. The incidence of intervertebral narrowing and irregular ossification of the vertebral end-plate image increased consistently with age and was higher in the presence of LBP in any age or gender group. Multiregression analysis was performed with the imaging factors as multivariates. As a result, multiregression equations with irregular ossification of the vertebral end-plate image, intervertebral narrowing, spondylolisthesis and abnormal lumbar lordotic angle combined as variates showed the highest significance as predictors of a relationship with LBP. The discrimination analysis was performed using the linear discriminant function, resulting in a true discrimination rate of 65%. Plain radiography of the lumbar spine is thus significant as it provides information which can be evaluated as meaningful findings in the investigation of LBP. In addition, while the significance can be increased by considering multiple factors, it is important to understand the limits of the accuracy of this prediction.