Multicenter Study

Multidisciplinary rehabilitation versus usual care for chronic low back pain in the community: effects on quality of life.

Spine J. 2003 Jul 1;3(4):270-6.
Randomized Controlled Trial

Relationship of physical examination findings and self-reported symptom severity and physical function in patients with degenerative lumbar conditions.

Phys Ther. 2005 Feb 1;85(2):120-33.
Comparative Study

Quality of life in chronic low back pain patients treated with instrumented fusion.

J Clin Nurs. 2008 Aug 1;17(15):2061-9.