Average depression, anxiety, and stress levels (DASS–21 score) among patients who avoided surgery and those who eventually underwent surgery after administration of a selective nerve root block (N = 50).
| DASS-21 | Surgery Avoided | Surgery Not Avoided | CI Lower | CI Upper | P Value |
| Depression | 5.3 ± 4.83 | 10.8 ± 7.25 | 1.37 | 9.52 | 0.010 |
| Anxiety | 3.3 ± 3.56 | 5.3 ± 4.27 | −0.88 | 4.81 | 0.172 |
| Stress | 8.2 ± 7.02 | 12.5 ± 7.07 | −1.12 | 9.78 | 0.116 |