The Recovery Curve for the Patient-Reported Outcomes Measurement Information System Patient-Reported Physical Function and Pain Interference Computerized Adaptive Tests After Primary Total Knee Arthroplasty

Ryland Kagan, Mike B. Anderson, Jesse C. Christensen, Christopher L. Peters, Jeremy M. Gililland, Christopher E. Pelt

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Background: We sought to characterize the typical recovery in physical function (PF) and pain interference (PI) after TKA using Patient-Reported Outcomes Measurement Information System (PROMIS) patient-reported outcome (PRO) measures. Methods: Ninety-one patients were enrolled into an institutional review board -approved prospective observational study. PROs were obtained preoperatively and postoperatively at 6 weeks, 3 months, 6 months, and 1 year. PROs included the PROMIS PF computerized adaptive test (CAT) and the PROMIS PI CAT. Generalized estimating equations were used to evaluate outcomes over time. Results: There was no difference in the preoperative and 6-week postoperative T-scores for the PF CAT (P =.410). However, all subsequent postoperative T-scores were greater than the preoperative T-score (all, P < 0.05). There was a significant reduction in PI CAT T-scores between the preoperative and all subsequent postoperative T-scores (all, P <.05). A clinically important difference in PF CAT T-scores (β = 5.44, 95% confidence interval 4.10-6.80; P <.001) and PI CAT T-scores (β = −7.46, 95% confidence interval −9.52 to −5.40; P < 0.001) was seen between the preoperative and 3-month postoperative visits. Sixty-three percent of the improvement in PF occurred by 3 months, and 89% had occurred by 6 months. The majority of reduction in PI (68%) occurred by 3 months and 90% had occurred by 6 months. Conclusion: The greatest magnitude of improvement in both PF and PI occurred within the first 3 months. After 6 months, patients might expect modest improvements in PF and mild reductions of PI. Patients and surgeons should use this information for setting expectations, planning for recovery, and improving care.

Original languageEnglish (US)
Pages (from-to)2471-2474
Number of pages4
JournalJournal of Arthroplasty
Volume33
Issue number8
DOIs
StatePublished - Aug 2018
Externally publishedYes

Keywords

  • pain interference
  • patient-reported outcomes
  • physical function
  • PROMIS
  • total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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