title: Functional disability scales for back pain.
abstract: Functional disability scales for back pain are reviewed for content and measurement properties, concentrating on five widely used questionnaires. Current methodological issues in functional assessment also are discussed.
authors.affiliation: Department of Epidemiology and Biostatistics, McGill University, Montreal, Canada.
authors.forename: J A
authors.initials: JA
authors.lastname: Kopec
authors.forename: J M
authors.initials: JM
authors.lastname: Esdaile
mesh_terms: D004185:Disability Evaluation; D006801:Humans; D017116:Low Back Pain / Q000175:diagnosis* / Q000628:therapy; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires