Pre- and postoperative pain scores collected through a retrospective chart review. Outcome scores were collected at a minimum 1 year postoperative time point. Note that there was a significant improvement in the overall pain score in all groups except for patients with a low (<5/10) preoperative pain score. All surgical indications other than primary disc herniation had significant improvement in overall pain score after interspinous process fusion.
| Preoperative Pain Score | Postoperative Pain Score | Paired t-test p value | |
|---|---|---|---|
| Overall | 7.2 ± 1.7 | 4.5 ± 2.8 | 0.0001* |
| Male | 7.1 ± 1.8 | 4.2 ± 2.9 | 0.001* |
| Female | 7.2 ± 1.6 | 4.7 ± 2.8 | 0.001* |
| Age > 59 | 7.3 ± 1.9 | 5.3 ± 3.0 | 0.05* |
| Age ≤ 59 | 7.1 ± 1.6 | 3.9 ± 2.6 | 0.001* |
| Preoperative pain ≥ 8/10 | 8.5 ± 0.7 | 5.0 ± 3.1 | 0.0001* |
| Preoperative pain < 5/10 | 4.4 ± 0.8 | 4.4 ± 2.5 | > 0.05 |
| BMI ≥ 30 | 7.4 ± 1.5 | 5.4 ± 2.8 | 0.01* |
| BMI < 30 | 7.1 ± 1.8 | 4.0 ± 2.7 | 0.0001* |
| Diagnosis | |||
| Stenosis | 7.4 ± 1.5 | 4.5 ± 2.8 | 0.0001* |
| Herniated Disc | 7.0 ± 2.0 | 4.8 ± 3.3 | > 0.05 |
| Spondylolisthesis | 7.8 ± 1.6 | 3.2 ± 3.1 | 0.01* |
| Operative Level | |||
| L2-3 | 7.0 ± 1.2 | 5.8 ± 1.1 | > 0.05 |
| L3-4 | 7.4 ± 2.1 | 4.5 ± 3.3 | > 0.05 |
| L4-5 | 7.5 ± 1.4 | 4.3 ± 2.4 | 0.001* |
| L5-S1 | 5.9 ± 1.7 | 3.8 ± 3.3 | > 0.05 |