Study with a matched comparison of the patient-reported outc
The surgical treatment options for severe knee osteoarthritis are unicompartmental (UKR) and total knee replacement (TKR). For patients, functional outcomes are more important than revision rate. The patient-reported outcome measures (PROMs) of both implant types using a large PROMs dataset were compared .

Researchers analysed a propensity-matched comparison of 38,716 knee replacements (19,358 UKRs and 19,358 TKRs) enrolled in the National Joint Registry and the English National PROM collection programme. Subgroup analysis were performed in different age groups.

--6-month postoperative Oxford Knee Score (OKS) for UKR and TKR were 38 and 36 respectively.

--A higher proportion of UKRs had an excellent OKS (more than 41) compared with TKR and a lower proportion of poor OKS (less than 27) scores.

--The 6-month OKS was higher in all age groups for UKR compared with TKR, with the difference increasing in older age groups.

--The mean 6-month EQ-5D score was 0.78 and 0.75 respectively.

--The improvement in EQ-5D resulting from surgery was higher for UKR than TKR both overall and in all age groups. All comparisons were statistically significant.

In comparison to TKR, UKR had a higher proportion of good OKS ratings and a smaller proportion of mediocre OKS scores. Furthermore, when compared to TKR, UKR had a superior quality of life. When deciding which technique to execute, these factors should be weighed against the greater revision rate for UKR.