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Facts & Figures

Up to 58% of patients

choose PKR over TKR


A discrete-choice experiment evaluating TKR & PKR


Giving patients an informed choice based on the evidence for the risks and benefits of different treatments has shown that a larger number of patients with knee osteoarthritis would prefer a PKR than the current usage rates in most countries suggest. In order to deliver more patient-centred care, the authors recommend that any decisions about arthroplasty treatment should be based on both the treatment indications and the patient’s preferences.1

“A discrete-choice experiment was developed with the following attributes: chance of complications, functional ability, awareness of the knee implant, and chance of needing another operation within 10 years.” Patients with end-stage knee osteoarthritis, aged between 40 and 80 years, completed 1 of 2 surveys depending on their self-reported functional ability (good vs fair/poor) as measured by the Oxford Knee Score.1

The completed surveys from 258 patients (92 males & 164 females) were analysed. There were 72 patients in the good-function cohort and 186 in the fair/poor-function cohort.1

“In the good-function cohort, 42% of respondents chose TKR and 58% chose PKR. In the fair/poor-function cohort, 54% chose TKR and 46% chose PKR.” 1

This study supports the recommendation from NICE that all patients with isolated medial compartment osteoarthritis be offered a choice of PKR or TKR; because they believe that patients perceive the relative risks and benefits of treatments differently according to their personal circumstances and priorities. 2

  1. Hutrya et al. Patient preferences for surgical treatment of knee osteoarthritis: A discrete-choice experiment evaluating total and uni-compartmental knee arthroplasty,. JBJS Am. (2020); 102: 2022-31. Find the source here.
  2. Joint replacement (primary): hip, knee and shoulder. NICE guideline [NG157]. Published date: 04 June 2020. 1.7 Procedures for primary elective knee replacement. NICE guideline [NG157] Published date: 04 June 2020

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