Correlations of Hip Mobility with Degree of Back Pain and Lumbar Spinal Mobility in Chronic Low-Back Pain Patients.MELLIN, GUY MDSpine: June 1988 Correlations of Hip Mobility with Degree of Back Pain and Lumbar Spinal Mobility in Chronic Low-Back Pain Patients: PDF Only Abstract Abstract : Mobility of hips and lumbar spine were measured in 301 men and 175 women who were in employment but suffered from chronic or recurrent low-back pain. The degree of low-back pain (LBP) was assessed with a questionnaire. Hip flexion, extension, internal rotation, and hamstring flexibility in the men, and hip flexion and extension in the women had statistically significant negative correlations with LBP. Among the correlations between hip and lumbar spinal mobility, hip flexion and extension with lumbar rotation were strongest. (C) Lippincott-Raven Publishers.