Table 2.
Multivariate logistic regression model of risk factors for unfavorable outcomes in the PRO score and the MCID method groups
| Characteristics | PRO score method | MCID method | ||
|---|---|---|---|---|
| Odds Ratio(95% Confidence Interval) | P value | Odds Ratio(95% Confidence Interval) | P value | |
| Age (years) | 1.032 (0.996–1.069) | 0.080 | 1.026 (0.990–1.063) | 0.166 |
| BMI (kg/m2) | 0.950 (0.875–1.030) | 0.213 | 0.993 (0.908–1.085) | 0.874 |
| Sex (Female) | 2.340 (1.211–4.520) | 0.011 | 1.496 (0.708–3.162) | 0.292 |
| Type of surgery (Decompression) | 1.161 (0.606–2.225) | 0.652 | ||
| Educational level (vs. university) | ||||
| Elementary school | 2.875 (1.075–7.688) | 0.035 | 1.299 (0.481–3.506) | 0.606 |
| Middle school | 1.082 (0.456–2.566) | 0.859 | 0.718 (0.283–1.819) | 0.485 |
| High school | 0.859 (0.380–1.943) | 0.715 | 0.892 (0.372–2.138) | 0.798 |
| Hypertension | 1.387 (0.714–2.697) | 0.334 | ||
| Preoperative ODI | 2.340 (1.211–4.520) | 0.028 | 0.920 (0.897–0.944) | < 0.001 |
Mean ± standard deviation; PRO score method divided the patients into favorable and unfavorable outcome groups by ODI scores ≤22 and ODI scores > 22, respectively; MCID method divided the patients into more and less-improved outcome groups based on a decrease in ODI scores by greater than 12.8 or less; VAS Visual analog scale; ODI Oswestry disability index