Patient characteristics and baseline parameters by group.
| Variable | Gly-20 | EA-95 | RFD | Total |
| Age (years) | 62.3 ± 11.5 | 65.6 ± 12.7 | 63.3 ± 16.1 | 63.7 ± 13.4 |
| Gender (F/M) | 26/9 | 16/14 | 18/12 | 60/35 |
| WHO pain level | 1.43 ± 0.56 | 1.37 ± 0.56 | 1.37 ± 0.56 | 1.39 ± 0.55 |
| VAS | 8.14 ± 1.26 | 7.87 ± 2.01 | 8.00 ± 1.46 | 8.01 ± 1.58 |
| COMI-back | 8.45 ± 1.46 | 8.02 ± 1.55 | 8.45 ± 0.94 | 8.31 ± 1.35 |
Data presented as mean ± SD unless otherwise noted.
COMI-back, Core Outcome Measures Index for the back; EA-95, ethyl alcohol 95%; Gly-20, glycerol 20%; RFD, radiofrequency denervation; VAS, visual analog scale; WHO, World Health Organization.