Minimal important difference of the 12-item World Health Organization Disability Assessment Schedule (WHODAS) 2.0 in persons with chronic low back pain.

"Declarations Ethics approval and consent to participateThis project has been approved by the Research Ethics Board at Ontario Tech University (Reference #17173). Consent for publicationNot applicable. Competing interestsJJW was supported by a Banting Postdoctoral Fellowship from the Canadian Institutes of Health Research (CIHR); and reports research grants from CIHR, Social Sciences and Humanities Research Council (SSHRC), and the Canadian Chiropractic Research Foundation (paid to university); and travel reimbursement for teaching from Eurospine outside the submitted work. PC was supported by a Canada Research Chair in Disability Prevention and Rehabilitation; and reports research grants from the Canadian Chiropractic Research Foundation, CIHR, College of Chiropractors of British Columbia, and World Health Organization (paid to university); payment for court testimony from the Canadian Chiropractic Protective Association and NCMIC, and travel expenses to teach from Eurospine, travel expenses to collaborate on research projects from Sophiahemmet University outside the submitted work. All remaining authors declare no conflicts of interest. Competing interests JJW was supported by a Banting Postdoctoral Fellowship from the Canadian Institutes of Health Research (CIHR); and reports research grants from CIHR, Social Sciences and Humanities Research Council (SSHRC), and the Canadian Chiropractic Research Foundation (paid to university); and travel reimbursement for teaching from Eurospine outside the submitted work. PC was supported by a Canada Research Chair in Disability Prevention and Rehabilitation; and reports research grants from the Canadian Chiropractic Research Foundation, CIHR, College of Chiropractors of British Columbia, and World Health Organization (paid to university); payment for court testimony from the Canadian Chiropractic Protective Association and NCMIC, and travel expenses to teach from Eurospine, travel expenses to collaborate on research projects from Sophiahemmet University outside the submitted work. All remaining authors declare no conflicts of interest."

"Funding None."