Table 3.

Mean EQ-5D_index scores before surgery and 3 months, 6 months and 1 year postoperatively in both groups

	C group	D group	P value
Before surgery	−0.01 ±  0.02	− 0.009 ± 0.04	0.073
3 months postoperatively	0.69 ± 0.05	0.55 ± 0.13	<0.001
6 months postoperatively	0.84 ± 0.10	0.75 ± 0.14	<0.001
1 year postoperatively	0.95 ± 0.07	0.92 ± 0.07	0.157