Abstract
Purpose
To assess whether preoperative joint space measures would be predictive of survivorship
in patients undergoing hip arthroscopy (HA) for femoroacetabular impingement (FAI).
Methods
Data on consecutive patients who underwent hip arthroscopy between February 2008 and
February 2018 were retrospectively reviewed. To be eligible for final analysis, patients
were required to have preoperative radiographs for joint space measurements and data
indicating conversion to a total hip arthroplasty (THA), hip resurfacing, or neither;
at a minimum of two years after primary hip arthroscopy. Survivorship following HA
was defined as remaining conversion free and served as the primary outcome. A multivariate
logistic regression analysis and receiver operator curve (ROC) were used to evaluate
the correlation between joint space measurements survivorship following HA.
Results
A total of 1,885 primary arthroscopy cases were included in this study. The multivariate
regression analysis found preoperative lateral-to-medial joint space ratio (L/M ratio)
to be the strongest predictive factor of survivorship after primary hip arthroscopy
(OR = 2.084, CI95% = 1.239 – 3.503, p = 0.006). The ROC curve for the model demonstrated acceptable
discrimination with an area under the curve (AUC) of 0.792. Patients with an L/M ratio
≥ 0.75 had a survivorship rate of 91.7% compared to a rate of 75% for patients with
an L/M ratio < 0.75 (OR: 3.68).
Conclusions
This study found that, of the factors evaluated in this study, the most significant
factor in predicting survivorship at 2-years after undergoing primary hip arthroscopy
was a larger lateral-to-medial joint space ratio. This may suggest an initiation of
primary arthritis at the edge-loading area of the lateral acetabulum.
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Article Info
Publication History
Accepted:
June 23,
2022
Received in revised form:
June 13,
2022
Received:
August 9,
2021
Publication stage
In Press Journal Pre-ProofFootnotes
This study was performed in accordance with the ethical standards in the 1964 Declaration of Helsinki. This study was carried out in accordance with relevant regulations of the US Health Insurance Portability and Accountability Act (HIPAA). Details that might disclose the identity of the subjects under study have been omitted. This study was approved by the IRB. (IRB ID: 5276)
This study was performed at the American Hip Institute Research Foundation.
All authors have participated in the preparation of this manuscript, are in agreement with its contents, and agree to be accountable for all aspects of the work and its accuracy.
Author Contributions:
Philip J. Rosinsky, MD. - Data collection/analysis and writing of the manuscript
Jeffrey W. Chen, BA. - Data collection/analysis and writing of the manuscript
Rachel M. Glein, BS. - Data collection and revision of manuscript
Andrew E. Jimenez, MD. - Data collection and revision of manuscript
Ciaran Brayboy - Data collection and revision of manuscript
Benjamin G. Domb, MD. - Data interpretation and revision of manuscript
Level of Evidence: III, retrospective comparative observation study
Identification
Copyright
© 2022 by the Arthroscopy Association of North America
