BACKGROUND: The use of Internet-based questionnaires for collection of data to evaluate patient education and other interventions has increased in recent years. Many self-report instruments have been validated using paper-and-pencil versions, but we…
OBJECTIVE: To estimate when a difference in disability symptoms is sufficiently large to be important to individual patients. DESIGN: Cross-sectional analysis of two groups: derivation set (n = 46) and validation set (n = 57). SETTING: The Arthritis…
