Final cohort (n = 38) | No posterior instrumentation (n = 14) | Posterior instrumentation (n = 14) | p-value* | ||||
---|---|---|---|---|---|---|---|
mean ± SD | (range) | mean ± SD | (range) | mean ± SD | (range) | ||
Follow-up (months) | 24.7 ± 2.4 | (23 – 34) | 25.4 ± 3.3 | (23 – 34) | 24.3 ± 1.6 | (23 – 30) | 0.143 |
Lower back pVAS | |||||||
Preoperative | 4.9 ± 1.4 | (2 – 8) | 5.0 ± 1.2 | (3 – 7) | 4.9 ± 1.5 | (2 – 8) | |
Postoperative | 1.4 ± 1.5 | (0 – 6) | 1.6 ± 1.8 | (0 – 6) | 1.3 ± 1.2 | (0 – 4) | 0.742 |
Net change | -3.5 ± 1.9 | (-7 – 0) | -3.4 ± 2.0 | (-7 – 0) | -3.6 ± 1.9 | (-7 – 0) | 0.735 |
Leg pVAS | |||||||
Preoperative | 3.7 ± 2.0 | (0 – 8) | 3.5 ± 2.2 | (0 – 7) | 3.8 ± 2.0 | (0 – 8) | |
Postoperative | 1.9 ± 1.6 | (0 – 6) | 2.4 ± 1.5 | (1 – 6) | 1.6 ± 1.6 | (0 – 5) | 0.137 |
Net change | -1.8 ± 2.8 | (-8 – 5) | -1.1 ± 2.9 | (-6 – 5) | -2.3 ± 2.7 | (-8 – 2) | 0.207 |
ODI | |||||||
Preoperative | 47.9 ± 11.4 | (32 – 72) | 49.6 ± 12.1 | (35 – 72) | 46.9 ± 11.1 | (32 – 72) | |
Postoperative | 14.8 ± 12.4 | (0 – 54) | 16.1 ± 14.0 | (0 – 54) | 14.0 ± 11.6 | (0 – 42) | 0.647 |
Net change | -33.1 ± 15.7 | (-64 – 6) | -33.5 ± 16.7 | (-64 -– 4) | -32.9 ± 15.4 | (-62 – 6) | 0.910 |
SF-12 physical | |||||||
Preoperative | 27.5 ± 6.4 | (16 – 44) | 27.2 ± 7.0 | (16 – 43) | 27.7 ± 6.2 | (17 – 44) | |
Postoperative | 45.4 ± 9.1 | (20 – 59) | 43.6 ± 9.7 | (20 – 55) | 46.5 ± 8.8 | (24 – 59) | 0.340 |
Net change | 17.9 ± 9.4 | (-9 – 36) | 16.4 ± 9.0 | (-1 – 32) | 18.8 ± 9.7 | (-9 – 36) | 0.214 |
SF-12 mental | |||||||
Preoperative | 35.8 ± 8.0 | (22 – 53) | 33.7 ± 8.0 | (25 – 53) | 37.0 ± 7.9 | (22 – 50) | |
Postoperative | 46.4 ± 9.3 | (21 – 59) | 46.3 ± 11.2 | (21 – 58) | 46.5 ± 8.2 | (27 – 59) | 0.705 |
Net change | 10.6 ± 13.2 | (-32 – 37) | 12.5 ± 15.9 | (-32 – 28) | 9.5 ± 11.6 | (-8 – 37) | 0.203 |