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Thresholds for the Oxford Hip Score after total hip replacement surgery: a novel approach to postoperative evaluation
Nicolai Kjærgaard1,2, Jonas B Kjærsgaard3,4, Christian L Petersen3,4
1Department of Orthopaedic Surgery, Aalborg University Hospital, Hobrovej 18-22, 9000, Aalborg, Denmark. n.kjaergaard@rn.dk.
Background:
This is a prospective cohort study to define the thresholds to distinguish patients with a satisfactory or unsatisfactory outcome after total hip replacement (THR) based on patient-reported outcome measures (PROMs) including the Oxford Hip Score (OHS), and using patient satisfaction and patient-perceived function as global transition items. The thresholds are intended to be used as a tool in the process of determining which patients are in need of postoperative outpatient evaluation.
Methods:
One hundred and three THR patients who had completed a preoperative questionnaire containing the OHS questionnaire were invited to complete the same questionnaire and supplementary questions at a mean of 6 (4-9) months after surgery. Correlations between outcome measures and anchors were calculated using Pearson's correlation coefficient. Thresholds were established by receiver operating characteristic (ROC) analysis, using multiple anchors.
Results:
Significant correlations were found between outcome measures and anchors. Thresholds were determined for outcome measures coupled with satisfaction, patient-perceived function and a combination thereof using a cut-off of 50 and 70.
Conclusions:
We have established a set of thresholds for Oxford scores that may help determine which THR patients are in need of postoperative evaluation. These thresholds can be implemented in clinical practice.
Level Of Evidence:
Level 3.
