Baseline versus 6-month | Baseline versus 2-year | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Clinical outcome | Allograft (n = 53) | PEEK (n = 35) | Interaction between Group and Time | Group | Time | Interaction between Group and Time | Group | Time | ||||
Preoperative | 6-month | 2-year | Preoperative | 6-month | 2-year | p-value | p-value | p-value | p-value | p-value | p-value | |
NPD | 31.2 ± 20.3 | 14.0 ± 16.9 | 8.8 ± 12.7 | 39.7 ± 27.2 | 20.6 ± 17.4 | 13.4 ± 13.8 | 0.667 | 0.063 | < 0.001 | 0.365 | 0.052 | < 0.001 |
NS | 47.3 ± 26.1 | 15.7 ± 22.3 | 14.6 ± 21.9 | 50.4 ± 29.9 | 18.2 ± 18.8 | 12.8 ± 14.0 | 0.928 | 0.543 | < 0.001 | 0.649 | 0.929 | < 0.001 |
NDI | 30.4 ± 20.9 | 15.1 ± 16.1 | 10.4 ± 15.1 | 38.5 ± 25.4 | 18.5 ± 17.3 | 11.4 ± 11.9 | 0.261 | 0.145 | < 0.001 | 0.126 | 0.174 | < 0.001 |
VASNP | 4.8 ± 3.6 | 1.3 ± 2.5 | 1.0 ± 2.3 | 4.4 ± 3.4 | 1.9 ± 3.0 | 0.9 ± 2.3 | 0.260 | 0.778 | < 0.001 | 0.939 | 0.832 | < 0.001 |
VASLP | 4.1 ± 3.9 | 0.8 ± 2.0 | 0.9 ± 2.2 | 2.7 ± 3.2 | 0.5 ± 1.7 | 0.2 ± 1.2 | 0.129 | 0.107 | < 0.001 | 0.451 | 0.087 | < 0.001 |
JOA | 13.7 ± 2.0 | 15.3 ± 2.1 | 15.5 ± 2.1 | 11.3 ± 4.3 | 14.3 ± 3.5 | 14.3 ± 3.2 | 0.011 | 0.162 | < 0.001 | 0.156 | 0.030 | < 0.001 |