Oswestry instrument (s·wesˑ·trē inˑ·str·ment),
n.pr in chiropractic medicine, a questionnaire used to monitor the progression of a patient throughout the treatment period. Specifically, this questionnaire evaluates changes in a patient's function and evaluates the patient's capability to perform day-to-day activities or the level of impairment occurring as a result of the spinal condition. A score of 0 indicates the complete absence of a disability, whereas 100 indicates an incapacitating condition. It is particularly beneficial when a practitioner needs to repeatedly compare scores throughout the treatment period.