Table 4 Changes in ODI and VAS scores from baseline according to spinal instability and revision surgery
Outcome | Had spinal instability | No spinal instability | P |
|---|---|---|---|
ODI (%) | |||
 1wk | 43.61 ± 14.51 | 61.79 ± 18.29 | 0.003 |
 3mo | 45.71 ± 12.61 | 69.73 ± 17.92 | 0.001 |
 1 yr | 48.89 ± 15.48 | 74.10 ± 16.97 | < 0.001 |
VAS for low back pain (%) | |||
 1wk | 47.05 ± 6.88 | 57.26 ± 11.53 | 0.002 |
 3mo | 45.89 ± 8.76 | 60.88 ± 11.48 | 0.001 |
 1 yr | 52.40 ± 8.23 | 65.44 ± 12.96 | 0.003 |
VAS for leg pain (%) | |||
 1wk | 50.88 ± 15.43 | 65.57 ± 16.47 | 0.012 |
 3mo | 48.52 ± 16.03 | 69.87 ± 16.95 | 0.003 |
 1 yr | 50.62 ± 20.71 | 72.26 ± 18.01 | 0.006 |
Outcome | Had revision surgery | No revision surgery | P |
ODI (%) | |||
 1wk | 46.57 ± 15.68 | 60.17 ± 18.93 | 0.018 |
 3mo | 46.95 ± 13.84 | 68.16 ± 18.66 | 0.006 |
 1 yr | 48.32 ± 18.56 | 72.86 ± 17.09 | 0.001 |
VAS for low back pain (%) | |||
 1wk | 47.03 ± 8.91 | 56.71 ± 11.29 | 0.009 |
 3mo | 46.96 ± 8.68 | 59.84 ± 12.14 | 0.007 |
 1 yr | 50.62 ± 9.11 | 65.12 ± 12.56 | 0.003 |
VAS for leg pain (%) | |||
 1wk | 52.19 ± 17.02 | 64.49 ± 16.68 | 0.048 |
 3mo | 49.53 ± 17.61 | 68.50 ± 17.55 | 0.018 |
 1 yr | 48.38 ± 21.03 | 71.57 ± 18.18 | 0.011 |