Odds of positive treatment outcome at 1 month as a function of selected baseline variables
| Variable | Unadjusted OR (95% CI) | P value | Adjusted OR (95% CI) | P value |
| Age, per year | 1.00 (0.98 to 1.03) | 0.87 | 1.01 (0.98 to 1.04) | 0.51 |
| Sex, female versus male | 0.88 (0.45 to 1.75) | 0.72 | 1.12 (0.52 to 2.42) | 0.78 |
| Duration of pain, per year | 0.94 (0.89 to 0.99) | 0.032 | 0.96 (0.90 to 1.01) | 0.13 |
| Opioid use, yes versus no | 0.58 (0.23 to 1.46) | 0.25 | 0.73 (0.26 to 2.03) | 0.55 |
| Baseline average NRS back pain score, per one-point increase | 0.76 (0.64 to 0.90) | 0.001 | 0.81 (0.67 to 0.99) | 0.038 |
| Baseline average NRS leg pain score, per one-point increase | 0.79 (0.66 to 0.94) | 0.009 | 0.90 (0.73 to 1.12) | 0.34 |
| Number of non-immunological allergies, per each additional HR | 0.65 (0.47 to 0.91) | 0.012 | 0.66 (0.47 to 0.94) | 0.022 |
HR, hypersensitivity reactions; NRS, numerical rating scale.