Patient-acceptable symptom state for the Oxford Hip Score and Forgotten Joint Score at 3 months, 1 year, and 2 years following total hip arthroplasty: a registry-based study of 597 cases

Authors

  • David Shin Harris Orthopaedic Laboratory, Massachusetts General Hospital, Boston, MA, USA
  • Vincent P Galea Harris Orthopaedic Laboratory, Massachusetts General Hospital, Boston, MA, USA
  • Lina Holm Ingelsrud Department of Orthopedic Surgery, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
  • Isabella Florissi Harris Orthopaedic Laboratory, Massachusetts General Hospital, Boston, MA, USA
  • Charles R Bragdon Harris Orthopaedic Laboratory, Massachusetts General Hospital, Boston, MA, USA; Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA, USA
  • Henrik Malchau Harris Orthopaedic Laboratory, Massachusetts General Hospital, Boston, MA, USA; Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA, USA
  • Kirill Gromov Department of Orthopedic Surgery, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
  • Anders Troelsen Department of Orthopedic Surgery, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark

DOI:

https://doi.org/10.1080/17453674.2020.1750877

Abstract

Background and purpose — Patient-acceptable symptom states (PASS) represent the level on a patient-reported outcome measure (PROM) at which patients are satisfied with postoperative outcomes. We defined the PASS for the Oxford Hip Score (OHS) and Forgotten Joint Score (FJS-12) at 3-month, 1-year, and 2-year intervals after primary total hip arthroplasty (THA).

Patients and methods — Between July 2018 and April 2019, primary THA patients in an academic medical center’s registry completed the OHS, FJS-12, and a satisfaction anchor question at 3-month (n = 230), 1-year (n = 180), or 2-year (n = 187) postoperative intervals. PASS thresholds were derived with receiver operating characteristic analysis using the 80% specificity method. 95% confidence intervals (CI) were calculated using 1,000 non-parametric bootstrap replications.

Results — 74%, 85%, and 86% of patients reported having a satisfactory symptom state at 3 months, 1, and 2 years after surgery, respectively. At 3-month, 1-year, and 2-year intervals, PASS thresholds were 34 (CI 31–36), 40 (CI 36–44), and 39 (CI 35–42) points for the OHS and 59 (CI 54–64), 68 (CI 61–75), and 69 (CI 62–75) points for the FJS-12.

Interpretation — PASS thresholds varied with time for both the OHS and the FJS-12, with lower 3-month compared with 1-year and 2-year thresholds. These PASS thresholds represent OHS and FJS-12 levels at which the average patient is satisfied with THA outcomes, helping to interpret PROMs and serving as clinically significant benchmarks and patient-centered outcomes for research.

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Published

2020-04-22

How to Cite

Shin, D. ., Galea, V. P., Ingelsrud, L. H., Florissi, I., Bragdon, C. R. ., Malchau, H., Gromov, K., & Troelsen, A. (2020). Patient-acceptable symptom state for the Oxford Hip Score and Forgotten Joint Score at 3 months, 1 year, and 2 years following total hip arthroplasty: a registry-based study of 597 cases. Acta Orthopaedica, 91(4), 372–377. https://doi.org/10.1080/17453674.2020.1750877