Anterolateral approach with tibial tubercle osteotomy versus standard medial approach for primary total knee arthroplasty: does it matter?

Table 3 Outcome preoperative, 12 and 24 months after surgery (mean ± standard deviation) for group A and group B

Outcome	Before surgery		Significance	12 months after surgery		24 months after surgery		Significance
	Group A	Group B	Between groups	Group A	Group B	Group A	Group B	Between groups	Within group A	Within group B
VAS pain	6.9 ± 1.4	7.0 ± 1.3	n.s.	1.5 ± 1.9	1.7 ± 1.9	0.9 ± 1.7	1.4 ± 1.7	p < 0.0001	p < 0.0001	p < 0.0001
VAS satisfaction	3.8 ± 1.8	3.5 ± 2.0	n.s.	8.8 ± 1.6	8.1 ± 1.9	9.1 ± 1.6	8.5 ± 2.2	p = 0.0059	p < 0.0001	p < 0.0001
Flexion passive	112 ± 15	115 ± 15	n.s.	115 ± 11	114 ± 11	118 ± 10	114 ± 10	p = 0.020	p = 0.0017	n.s.
Knee Score (KSS) Total	103 ± 25	86 ± 26	p = 0.00014	180 ± 24	166 ± 26	182 ± 25	171 ± 27	p = 0.0008	p < 0.0001	p < 0.0001
KSS - Knee Score	50 ± 15	40 ± 15	p = 0.00024	91 ± 11	86 ± 14	93 ± 11	88 ± 13	p = 0.0004	p < 0.0001	p < 0.0001
KSS - Function Score	53 ± 17	46 ± 19	p = 0.027	90 ± 17	81 ± 16	89 ± 18	83 ± 18	p = 0.015	p < 0.0001	p < 0.0001

Wilcoxon Two Sample Test (two sided) for differences between groups, paired t-test for differences within group, level of significance p < 0.05