Table 3.
Statistical significance of differences between preoperative and postoperative clinical scores and radiological angles
| Assessment | Preoperative mean (SD) | Last follow-up mean (SD) | No. of patients | Mean difference (SD) | Statistics using paired t test | ||
|---|---|---|---|---|---|---|---|
| t value | df | p value | |||||
| Nurick’s grade | 3.55 (0.73) | 2.46 (0.73) | 101 | −1.10 (0.90) | 12.27 | 100 | <0.001 |
| JOA Score | 11.43 (2.10) | 14.15 (1.74) | 95 | 2.72 (2.20) | −12.05 | 94 | <0.001 |
| Segmental angle in neutral position | 10.76 (9.28) | 6.02 (8.32) | 92 | −4.74 (6.51) | 6.99 | 91 | <0.001 |
| Segmental angle in flexion | −12.69 (7.94) | −10.20 (8.03) | 52 | −2.49 (6.42) | −2.80 | 51 | 0.007 |
| Segmental angle in extension | 16.27 (8.26) | 9.18 (7.69) | 39 | −7.09 (7.45) | 5.95 | 38 | 0.007 |
| Range of neck movement | 29.52 (11.11) | 19.75 (9.51) | 38 | −9.77 (8.68) | 6.94 | 37 | <0.001 |