Unicompartmental knee arthroplasty vs high tibial osteotomy for knee osteoarthritis: A comparison of clinical and radiological outcomes

Table 2 Between-group comparison of preoperative and postoperative patient reported outcome measures scores

	Preoperative				Postoperative
	UKA group mean (SD)	HTO group mean (SD)	P value1	95%CI	UKA group mean (SD)	HTO group mean (SD)	P value1	95%CI
KOOS:
Pain	32.5 (8.2)	35.2 (17.7)	0.530	-5.8 to 11.1	91.1 (12.7)	87.2 (12.4)	0.419	-13.5 to 5.8
Symptoms	42.3 (17.8)	38.2 (17.8)	0.462	-15.2 to 7.1	87.0 (12.9)	73.0 (17.3)	0.012a	-24.6 to -3.3
ADLs	38.0 (9.1)	42.2 (17.3)	0.320	-4.2 to 12.6	90.6 (13.9)	90.2 (10.8)	0.936	-9.8 to 9.1
Sport/Rec	19.0 (21.3)	14.4 (12.4)	0.455	-16.9 to 7.7	78.7 (28.9)	71.8 (27.6)	0.549	-30.1 to 16.4
QoL	17.8 (11.9)	13.0 (11.9)	0.211	-12.5 to 2.9	80.1 (21.8)	67.8 (14.8)	0.107	-27.4 to 2.8
Overall	29.1 (7.9)	27.1 (13.1)	0.580	-9.3 to 5.3	85.2 (17.3)	78.4 (13.6)	0.295	-19.8 to 6.3
OKS	16.5 (5.6)	18.4 (7.8)	0.362	-2.3 to 6.1	42.4 (6.3)	42.1 (5.2)	0.872	-4.7 to 4.0
EQ-5DIndex	35.6 (24.0)	37.4 (29.7)	0.834	-15.4 to 19.0	84.7 (18.8)	80.8 (15.1)	0.557	-17.4 to 9.6
EQ-5DVAS	72.4 (17.6)	64.8 (23.4)	0.237	-20.4 to 5.2	88.3 (12.7)	82.9 (9.6)	0.210	-14.0 to 3.2
SF-12 PCS	28.9 (5.8)	32.1 (7.7)	0.143	-1.1 to 7.5	50.9 (7.7)	50.0 (8.9)	0.983	-7.4 to 5.5
SF-12 MCS	51.0 (11.4)	42.9 (13.0)	0.043a	-15.9 to -0.3	51.8 (9.7)	50.8 (10.5)	0.511	-8.8 to 6.9

¹Independent-sample Student’s t-test.

^aP < 0.05, statistically significant.

SD: Standard deviation; UKA: Unicompartmental knee arthroplasty; HTO: High tibial osteotomy; PROM: Patient reported outcome measures; KOOS: Knee injury and osteoarthritis outcome score; ADL: Activities of daily living; Sport/Rec: Sport and recreation; QoL: Quality of life ; OKS: Oxford knee score; EQ-5D^index: EuroQol–5 dimension descriptive component; EQ-5D^vas: EuroQol–5 dimension visual analogue scale; SF-12 PCS: 12 item Short Form survey physical component score; SF-12 MCS: 12 item Short Form survey mental component score.