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

Table 4 Correlation analysis: Preoperative radiographic parameters and preoperative patient reported outcome measures

	Angle of Mikulicz line	HKA	MAD
	r (P value1)	r (P value1)	r (P value1)
KOOS:
Pain	-0.18 (0.290)	-0.12 (0.484)	-0.01 (0.938)
Symptoms	-0.36 (0.022a)	0.15 (0.352)	0.16 (0.336)
ADLs	-0.37 (0.020a)	0.06 (0.707)	0.10 (0.534)
Sport/Rec	-0.04 (0.839)	0.06 (0.737)	0.16 (0.357)
QoL	-0.34 (0.040a)	-0.23 (0.169)	-0.14 (0.415)
Overall	-0.38 (0.026a)	-0.04 (0.844)	0.07 (0.698
OKS	-0.41 (0.010a)	0.13 (0.422)	0.21 (0.201)
EQ-5DIndex	-0.45 (0.005a)	-0.07 (0.670)	-0.02 (0.896)
EQ-5DVAS	-0.29 (0.071)	0.03 (0.843)	0.06 (0.709)
SF-12 PCS	-0.23 (0.158)	0.26 (0.112)	0.34 (0.035a)
SF-12 MCS	-0.23 (0.173)	-0.05 (0.773)	-0.08 (0.641)

¹Pearson’s product-moment correlation analysis.

^aP < 0.05, statistically significant.

r: Correlation co-efficient; UKA: Unicompartmental knee arthroplasty; HTO: High tibial osteotomy; PROM: Patient reported outcome measures; HKA: Hip knee ankle angle; MAD: Mechanical axis deviation; KOOS: Knee injury and osteoarthritis outcome score; ADL: Activities of daily living; Sport/Rec: Sport & 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.