Table 4.

Oxford Knee Scores (OKS) for the Triathlon^® and Attune^® systems pre-operatively and at 6 months, 2 years and 5 years post-operatively

OKS	Prosthesis	N	Mean	Std. deviation	P-value
PRE	Attune	416	20.6	8.4	0.001
	Triathlon	261	17.8	8.3
0.5	Attune	424	38.7	6.8	0.162
	Triathlon	263	37.8	7.5
2	Attune	425	42.6	5.0	0.105
	Triathlon	261	41.7	6.2
5	Attune	398	42.6	5.2	0.001
	Triathlon	238	41.0	6.4
5 year improvement	Attune	374	21.7	8.7	0.315
	Triathlon	222	22.5	8.7
Potential Improvement	Attune	374	27.1	8.1	0.0005
	Triathlon	222	29.6	8.2
% attained of potential improvement	Attune	374	79.5	0.2	0.005
	Triathlon	222	75.9	0.2

EQ-VAS	Prosthesis	N	Mean	Std. deviation	P-value
PRE	Attune	116	70.7	20.6	0.404
	Triathlon	77	68.7	19.1
0.5	Attune	233	79.9	13.5	0.659
	Triathlon	159	84.2	73.2
2	Attune	425	80.9	15.0	0.032
	Triathlon	260	78.8	14.7
5	Attune	397	80.4	13.7	0.250
	Triathlon	238	78.6	15.3

We have highlighted the results that reached statistical significance in bold. The level of significance was set at P <0.05 for this study