A Study of the Natural History of Back Pain: Part IDevelopment of a Reliable and Sensitive Measure of Disability in Low-Back PainROLAND MARTIN MA MRCP MRCGP;; MORRIS, RICHARD MSc; Spine: March 1983 1982 Volvo Award in Clinical Science: PDF Only Abstract One of the problems in mounting a trial of treatment of back pain is the lack of suitable outcome measures. This paper describes the development and validation of a questionnaire designed to measure selfrated disability due to back pain. The questionnaire is short, simple, sensitive, and reliable. It would be suitable for use in future trials of treatment. © Lippincott-Raven Publishers.