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Short-term outcome of unicompartmental knee arthroplasty in the octogenarian population

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

Abstract

Purpose

Unicompartmental knee arthroplasty (UKA) provides significant benefits to patients with anteromedial osteoarthritis, with good long-term results. Morbidity and mortality rates are lower, and recovery is quicker. These benefits would be advantageous to the octogenarian population whom carry significant comorbidities. The primary aim was to compare the short-term functional outcome at 2 years of UKA in the octogenarian population against a stratified younger cohort of patients. We hypothesised that the octogenarian population would have equally significant improved patient-reported outcome measures.

Methods

Prospective patient-reported outcome measures, including Oxford Knee Score (OKS), satisfaction rates and Euro-Quol (EQ-5D) scores at 1-year and 2-year post-operative data, were collected and analysed. Three hundred and ninety-five medial Oxford Phase 3 UKA implants were evaluated. Mean follow-up was 4.7 years (range 2.1–7.7). Secondary outcomes including revision rates, length of stay, complications and mortality were recorded. Our patient population was stratified into three cohort groups based on age: 60–69, 70–79 and 80–89 years.

Results

The OKS and EQ-5D score improved significantly in all three groups at all post-operative time periods and maintained at 2 years. The OKS at 2 years post-operatively by age was 39.5 (SD 18.6), 39.2 (SD 17.7) and 39.3 (SD 15.9), respectively. No significant difference of implant survival was found between the groups. The overall revision rate was 28/395 (7%). The 90-day mortality in the present series was one patient.

Conclusion

The 2-year short-term functional outcome, revision rates and satisfaction of UKA in the octogenarian population did not differ statistically from other age groups.

Level of evidence

III.

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Acknowledgements

We would like to acknowledge the assistance of Mohamed Elsherbiny for his assistance with the statistical analysis. All the authors have been actively involved in the planning and enactment of the study and have also assisted with the preparation of the submitted article. The article has not been submitted elsewhere. The references have been checked and are correct. The authors have read the Submission Guidelines, and the paper conforms to this guide in all respects.

Author contribution

BJT was involved in data collection and data analysis and wrote the paper. JD wrote the paper and was involved in proofreading the final version and data analysis. RT performed the surgery, edited and proofread the paper and final version.

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Authors and Affiliations

  1. Registrar in Trauma and Orthopaedics, St Richards Hospital, Western Sussex Hospitals, Spitalfield Lane, Chichester, PO19 6SE, UK

    Baha John Tadros

  2. Specialist Registrar (ST8) in Trauma and Orthopaedics, South West London Elective Orthopaedic Centre, Epsom Hospital, Dorking Road, Epsom, KT18 7EG, UK

    John Dabis

  3. Consultant Orthopaedic Surgeon, South West London Elective Orthopaedic Centre, Epsom Hospital, Dorking Road, Epsom, KT18 7EG, UK

    Roy Twyman

Authors
  1. Baha John Tadros
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  2. John Dabis
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Correspondence to John Dabis.

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Conflict of interest

The authors declare no conflict of interest.

Funding

No financial support was received for this study.

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No ethical approval was required from the NHS Medical research council.

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Tadros, B.J., Dabis, J. & Twyman, R. Short-term outcome of unicompartmental knee arthroplasty in the octogenarian population. Knee Surg Sports Traumatol Arthrosc 26, 1571–1576 (2018). https://doi.org/10.1007/s00167-017-4639-y

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  • DOI: https://doi.org/10.1007/s00167-017-4639-y

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