Development and validation of a questionnaire assessing discrepancy between patients’ pre-surgery expectations and abilities and post-surgical outcomes following knee replacement surgery

Abstract

Purpose: The discrepancy between patient-desired outcomes and achievable functional outcomes is a source of patient dissatisfaction. This paper reports development and validation of a questionnaire to assess this discrepancy in patients undergoing knee replacement surgery. Methods: The initial questionnaire (Knee Surgery Perception Questionnaire, KSPQ) comprised two parts. Part A, assessed patients’ perception of their current level of function and pain, and Part B, assessed patients’ desired outcomes of the surgery. Validation was carried out for Part A and then applied to Part B using a one-factor congeneric model and was tested in 185 patients preceding surgery. A discrepancy score betwee..