Table 3.

VAS Scores pre and post implant & Change in VAS Scores Over Time

VAS	Pre-implant (n=5640**)	6 months (n=3353**)
0 – 25	2714 (48.1%)	404 (12.1%)
26 – 50	1589 (28.2%)	347 (10.3%)
51 – 75	908 (16.1%)	974 (29.0%)
76 – 100	429 (7.6%)	1628 (48.6%)
Total	5640 (100%)	3353 (100%)
Change in VAS(n=2748*)		n	%
Increase
>20		1637	59.6%
11 – 20		254	9.2%
1 – 10		274	10.0%
Decrease (or no change)
0 – 10		396	14.4%
11 – 20		62	2.3%
> 20		125	4.6%

^*Only includes paired data (patients with both pre and post 6 months completed EQ-5D)

^**completed forms includes patients who filled out the EQ-5D and also those patients captured as ‘too sick’ to complete the EQ-5D. ‘Too sick’ patients were assigned a value of 0 for the VAS and ‘extreme problems’ for the 3 physical dimensions of Mobility, Self Care and Usual Activities