Table 4. Multivariate Logistic Regression Results for Predicting Clinical Outcome.
| Parameter | Category | Exp (B) | 95% CI for Exp (B) | P | |
|---|---|---|---|---|---|
| Lower | Upper | ||||
| Approach | Midline | 1.135 | 0.564 | 2.287 | 0.723 |
| Gender | Male | 1.125 | 0.575 | 2.201 | 0.730 |
| Cause | Disc herniation | 3.964 | 1.829 | 8.592 | < 0.001 |
| Age (years) | 1.013 | 0.979 | 1.048 | 0.459 | |
| Duration (months) | 0.972 | 0.925 | 1.023 | 0.279 | |
| Constant | 0.651 | 0.683 | |||
Estimated odds ratio (after controlling for all other independent variables). CI = confidence interval, Exp (B) = estimated odds ratio