Table 3.
Patient-Reported Outcomesa.
| One Level, Mean (SD) | Two Levels, Mean (SD) | Three or More Levels, Mean (SD) | Two Levels (vs One) Multivariate Linear Regression | Three or More Levels (vs One) Multivariate Linear Regression | |||
|---|---|---|---|---|---|---|---|
| Beta | P | Beta | P | ||||
| Preoperative | |||||||
| VAS back | 6.04 (2.66) | 6.78 (3.01) | 6.49 (4.05) | 0.89 | .163 | −1.13 | .416 |
| VAS leg | 5.56 (2.79) | 5.55 (3.43) | 6.51 (4.36) | −0.16 | .837 | −0.72 | .663 |
| ODI | 39.13 (15.34) | 43.52 (15.79) | 53.19 (27.42) | 4.91 | .174 | 3.81 | .629 |
| Final | |||||||
| VAS back | 2.98 (2.91) | 4.56 (3.08) | 5.66 (3.15) | 0.96 | .224 | 1.54 | .311 |
| VAS leg | 3.43 (3.03) | 3.92 (3.31) | 2.99 (3.08) | 0.76 | .351 | −1.07 | .487 |
| ODI | 26.47 (20.17) | 33.31 (19.06) | 37.96 (22.06) | 4.05 | .332 | 11.39 | .138 |
| Change preoperative to final | |||||||
| VAS back | 3.58 (2.88) | 2.18 (2.24) | 0.14 (2.31) | −0.90 | .383 | −4.61 | .016 |
| VAS leg | 2.86 (3.64) | 2.50 (3.80) | 4.04 (5.43) | −1.15 | .447 | −1.12 | .670 |
| ODI | 15.58 (16.25) | 13.58 (17.71) | 3.51 (15.30) | −5.79 | .294 | −14.89 | .134 |
Abbreviations: SD, standard deviation; VAS, Visual Analog Scale; ODI, Oswestry Disability Index.
a Bolded text indicates statistically significant values at P < .05.