The radiologic evaluation of low back pain syndrome has been widely used in many clinics. With a few exception, it does not give us positive findings in many cases inspite of persistent complain.

The objective of this study was to provide an aid in diagnosis and objective follow up-reeval-uation by presenting reliable radiologic parameters. The radiologic parameters, such as lumbar lordosis, sacral inclination, and lumbosacral joint angle were taken with Wiltse and Winter's method.

The parameters were taken in 20 cases of low back pain group 20 cases of non-low back pain group, In low back pain group, the mean degree of lumbar lordosis, the mean degree of sacral inclination, and mean degree of lumbosacral joint angle were 27.7 ⁑ 6.3⁗, 37.5 ⁑ 7.1⁗, and 9.0 ⁑ 6.9⁗respectively. In non-low back pain group, the mean degree of lumbar lordosis, the mean degree of lumbar lordosis, the mean degree of sacral inclination, and the mean degree of lumbosacral joint angle were 21.7 ⁑ 7.0⁗,31.3 ⁑ 7.0⁗, and 10.2 ⁑ 5.6⁗ respectively. There were statistically significant increases in lumbar lordosis and sacral inclination in low back pain group.