Preoperative and 3-mo PROs in patients undergoing elective 1-level open posterior lumbar fusion.
| PROs | Preoperative | 3 mo | Minimum Clinically Important Difference 30% Reduction at 3 mo | P Value 3 mo to Preoperative |
| With interbody | ||||
| NRS back | 6.8 ± 2.3 | 3.4 ± 2.7 | 432 (56.6%) | <0.001 |
| NRS leg | 6.8 ± 2.4 | 2.5 ± 3.0 | 470 (75.3%) | <0.001 |
| ODI | 46.2 ± 13.9 | 27.5 ± 17.4 | 400 (52.4%) | <0.001 |
| Without interbody | ||||
| NRS back | 6.7 ± 2.7 | 3.3 ± 2.7 | 258 (61.4%) | <0.001 |
| NRS leg | 6.6 ± 2.8 | 2.8 ± 3.0 | 241 (57.4%) | <0.001 |
| ODI | 47.1 ± 15.1 | 28.9 ± 18.5 | 375 (53.3%) | <0.001 |
Abbreviations: NRS, Numeric Rating Scale; ODI, Oswestry Disability Index; PROs, patient-reported outcomes.
Note: Mean ± SD for continuous variables and n (%) for categorical variables.