Table 2 Functional outcome by HHS score and EQ-5D index. Comparison between groups (mean ± standard deviation)

 3 months

73.66 ± 4.30

76.18 ± 4.13

−2.302

0.024

 6 months

85.15 ± 3.92

88.05 ± 7.44

−2.123

0.037

 12 months

90.43 ± 2.38

91.23 ± 3.66

−1.092

0.279

 24 months

92.51 ± 2.80

92.91 ± 2.93

−0.543

0.589

 3 months

0.61 ± 0.16

0.70 ± 0.12

−2.385

0.020

 6 months

0.68 ± 0.14

0.74 ± 0.11

−2.022

0.047

 12 months

0.77 ± 0.11

0.79 ± 0.17

−0.792

0.431

 24 months

0.81 ± 0.12

0.82 ± 0.14

−0.372

0.711