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NRS score results of age- and gender-matched patients with one level injected compared to those having more than one spinal level injected within the group of responders (postal questionnaire)
| Baseline data and outcomes | 1 level injected, mean + (SD) | 2 or more levels injected, mean + (SD) | 1 vs. > 2 levels (p) |
|---|---|---|---|
| Pre NRS (baseline) | 6.5 (2.1) | 7.2 (2.1) | 0.144 |
| 20-30-min NRS | 3.7 (2.6)* | 3.8 (2.6)* | 0.991 |
| 1-month NRS | 4.4 (2.5)* | 3.9 (2.7)* | 0.371 |
*p < 0.05 compared to baseline scores
