2015 ISAKOS Biennial Congress ePoster #1719

Patinet-Reported Outcomes After High Tibial Osteotomy and Unicompertmental Arthroplasty

Yuichiro Kii, Sapporo, Hokkaido JAPAN
Tomoyuki Suzuki, MD, PhD, Sapporo, Hokkaido JAPAN
Shinichiro Okimura, MD, Osaka JAPAN
Akira Sugi, MD, Sapporo, Hokkaido JAPAN
Kota Watanabe, MD, Sapporo, Hokkaido JAPAN
Toshihiko Yamashita, MD, PhD, Sapporo, Hokkaido JAPAN

Sapporo Medical University, Department of Orthopaedic Surgery, Sapporo, Hokkaido, JAPAN

FDA Status Not Applicable

Summary: We compared patient-reported outcomes of HTO and UKA and patients undergoing UKA had difficulty in ascending and descending stairs and housework compared with those undergoing HTO.




Both high tibial osteotomy (HTO) and Unicompartmental knee arthroplasty (UKA) bring about satisfactory outcomes in the management of unicompartmental knee osteoarthritis (OA). There is controversy as to appropriate patient selection for these procedures because there is considerable overlap in indications.


The purpose of the present study is to compare patient-reported outcomes of HTO and UKA.


We retrospectively evaluated 128 patients who underwent 102 HTOs and 49 UKAs between 2010 and 2013. All patients had medial unicompartmental arthritis. One senior author performed all of the HTO and UKA procedures. The mean follow-up was 22.3 months in HTOs and 18.1 months in UKAs. We assessed pre- and postoperative questionnaires for the Japanese Knee Osteoarthritis Measure (JKOM), which are patient-reported outcome measures of functional ability and pain. Paired t-test was used for comparisons between pre- and postoperative JKOM in the two procedures.
P values of less than .05 were considered statistically significant. All statistical analyses were performed with SPSS.ver.21.0.


Visual analog scale (VAS) significantly declined from 81.5 to 21.4 points in HTOs and from 77.6 to 28.6 points in UKAs. The points total of JKOM significantly improved from 59.2 to 20.1 points postoperatively in HTOs and from 60.8 to 27.6 in UKAs. All four subscales significantly improved postoperatively in both HTOs and UKAs. Postoperative JKOM ADL subscale in HTOs was significantly lower than that in UKAs, especially in stair ascending and descending, and in housework.


Patients who had undergone UKA had difficulty in ascending and descending stairs and in housework compared with those who underwent HTO. The findings help not only surgeons but also patients in selecting a surgical procedure.