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Danish Hip Arthroscopy Registry: predictors of outcome in patients with femoroacetabular impingement (FAI)

  • Hip
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Predictors of outcome after femoroacetabular impingement (FAI) surgery are not well-documented. This study presents data from the Danish Hip Arthroscopy Registry (DHAR) for such analyses. The purpose of this study was to identify predictors of poor outcome after FAI surgery in a Danish FAI population. The primary hypothesis was that older patients, patients with severe cartilage damage and female patients might have inferior outcome results compared with younger patients, patients with minor cartilage damage and male patients.

Methods

Radiological and surgical data as well as patient-reported outcome measures (PROM) from FAI patients in DHAR between January 2012 and May 2015 were collected. PROMs consisting of Copenhagen Hip and Groin Outcome Score (HAGOS), quality of life (EQ-5D), Hip Sports Activity Scale (HSAS) and Numeric Rating Scale (NRS) pain scores were assessed. The patients were divided into three age groups (< 25, 25–39 and ≥ 40 years). Cartilage injuries were classified according to International Cartilage Repair Society (ICRS) (femoral side) and modified Becks (acetabular side) classifications. A non-parametric statistic method was used to analyze the differences between the preoperative and postoperative PROM values.

Results

Data from 2054 FAI procedures in DHAR was collected. 53% of the procedures were done in female patients. All HAGOS sub-scales, EQ-5D, HSAS and NRS pain (rest and walk) demonstrated significant improvements in all age groups at follow-up. Comparison between age groups demonstrated poorer outcomes in both older age groups when compared with the < 25 years age group at 1- and 2-year follow-ups. Higher degrees of femoral and acetabular cartilage injury did have a negative influence on outcome at follow-up. Comparison between genders demonstrated lower preoperative outcomes in females and lower outcome score (HSAS) 1 and 2 years after FAI surgery.

Conclusions

Age above 25 and major cartilage injury might negatively affect the outcome of surgery, however, gender could not be identified as a negative predictor of clinical outcome after FAI surgery, but might negatively affect sports participation in females.

Level of evidence

III, prospective cohort study.

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Funding

There was no funding.

Author information

Authors and Affiliations

  1. Department of Orthopedics, Division of Sports Traumatology, Aarhus University Hospital, 8000, Aarhus C, Denmark

    Bjarne Mygind-Klavsen, Torsten Grønbech Nielsen & Martin Lind

  2. Department of Orthopedics, Horsens Regional Hospital, 8700, Horsens, Denmark

    Bent Lund

  3. Department of Orthopedics, Odense University Hospital, 5000, Odense, Denmark

    Niels Maagaard

  4. Department of Orthopedic Surgery, Sports Orthopedic Research Center-Copenhagen (SORC-C), Copenhagen University Hospital, Amager-Hvidovre, 2650, Hvidovre, Denmark

    Otto Kraemer & Per Hölmich

  5. CFR Private Hospital, 2900, Hellerup, Denmark

    Søren Winge

Authors
  1. Bjarne Mygind-Klavsen
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  2. Bent Lund
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  3. Torsten Grønbech Nielsen
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  4. Niels Maagaard
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  5. Otto Kraemer
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  6. Per Hölmich
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  7. Søren Winge
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  8. Martin Lind
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Contributions

All authors made substantial contributions to conception and design, analysis and interpretation of data. TGN made substantial contributions to the acquisition of data, statistical analysis and interpretation of data. All authors have been involved in drafting the manuscript or revising it critically for important intellectual content. All authors have read and approved the final manuscript.

Corresponding author

Correspondence to Bjarne Mygind-Klavsen.

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Conflict of interest

The authors declare that they have no competing interests.

Ethical approval

Ethical approval was not sought for the present study. Handling of data from DHAR is approved by the Danish Data Protection Agency and DHAR is approved by the Danish Health Authority.

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For this type of study formal consent is not required.

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Mygind-Klavsen, B., Lund, B., Nielsen, T.G. et al. Danish Hip Arthroscopy Registry: predictors of outcome in patients with femoroacetabular impingement (FAI). Knee Surg Sports Traumatol Arthrosc 27, 3110–3120 (2019). https://doi.org/10.1007/s00167-018-4941-3

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  • DOI: https://doi.org/10.1007/s00167-018-4941-3

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