Reliability, validity, and responsiveness of the short form 12-item survey (SF-12) in patients with back pain.

Study Design: Secondary analysis of data collected from spine patients' normal clinic visits from 1998 to 2001.

Objective: To evaluate the reliability, validity, and responsiveness of the short form 12-item survey in patients with back pain.

Summary Of Background Data: The reliability, validity, and responsiveness of the short form 12-item survey in patients with back pain has not been previously evaluated.