Bivariate analysis achievement for PROMIS PF.
| Characteristic | Failed MCID (%) | RR | 95% CI | P valuea |
| Overall | 17.0% | – | – | – |
| Age | ||||
| 18–50 y | 18.5% | Reference | ||
| <50 y | 81.5% | 0.89 | (0.7–1.1) | 0.363 |
| Gender | ||||
| Male | 43.5% | 1.1 | (0.9–1.4) | 0.309 |
| Female | 56.5% | Reference | ||
| BMI | ||||
| <30 kg/m2 | 46.7% | Reference | ||
| ≥30 kg/m2 | 53.3% | 1.4 | (1.1–1.7) | 0.002 |
| Smoking status | ||||
| Nonsmoker | 87.0% | Reference | ||
| Smoker | 13.0% | 0.9 | (0.6–1.3) | 0.817 |
| Diabetes | ||||
| Nondiabetic | 79.3% | Reference | ||
| Diabetic | 20.7 | 1.2 | (0.9–1.5) | 0.099 |
| Ageless CCI | ||||
| <1 | 3.3% | Reference | ||
| ≥1 | 96.7% | 1.5 | (0.7–3.5) | 0.332 |
| ASA score | ||||
| <2 | 63.0% | Reference | ||
| ≥2 | 37.0 | 1.1 | (0.9–1.3) | 0.487 |
| Insurance | ||||
| WC | 84.8% | Reference | ||
| Non-WC | 15.2% | 1.1 | (0.9–1.4) | 0.508 |
| Operative length | ||||
| <50 min | 43.5% | Reference | ||
| ≥50 min | 56.5% | 1.1 | (0.9–1.3) | 0.508 |
| EBL | ||||
| <50 mL | 50.0% | Reference | ||
| ≥50 mL | 50.0% | 1.1 | (0.9–1.3) | 0.411 |
| Operative levels | ||||
| Single | 71.7% | Reference | ||
| Multilevel | 28.3% | 1.4 | (1.2–1.7) | 0.001 |
| Operative technique | ||||
| Laminectomy only | 23.3% | 1.3 | (0.9–1.8) | 0.077 |
| Discectomy only | – | – | – | – |
| Laminectomy + discectomy | 75.4% | 0.8 | (0.6–1.1) | 0.147 |
| Spinal pathologies | ||||
| HNP | 46.7% | 0.8 | (0.6–0.9) | 0.015 |
| Central stenosis | 10.9% | 1.2 | (1.0–1.5) | 0.094 |
| Foraminal stenosis | 15.2% | 1.3 | (1.0–1.7) | 0.088 |
Boldface indicates statistical significance.
aP value calculated using Poisson regression.
ASA, American Society of Anesthesiologists; BMI, body mass index; CCI, Charlson Comorbidity Index; EBL, estimated blood loss; HNP, herniated nucleus pulposus; PROMIS PF, patient-reported outcomes measures information system physical function; RR, relative risk; WC, workers’ compensation.