Baseline demographic data stratified by treatment group (n=64)
| Characteristics | Radiofrequency Ablation (N=32) | Sham radiofrequency (N=32) | P value |
| Age (years): mean±SD | 64.8±11.1 | 68.6±8.5 | 0.13 |
| Sex (M/F) | 7/25 | 5/27 | 0.52 |
| Body mass index: mean±SD | 29±3 | 28±5 | 0.73 |
| Duration of pain (years): mean±SD | 5.2±3.3 | 4.9±3.9 | 0.77 |
| VAS: mean±SD | 7.1±1.7 | 6.3±1.7 | 0.07 |
| WOMAC score | 91.2±38.2 | 95.8±41.1 | 0.65 |
| Tramadol or codeine use (n, %) | 16 (50) | 15 (47) | 0.80 |
| Radiographic disease severity (Kellgren-Lawrence grade) | |||
| 3 | 15 | 17 | 0.62 |
| 4 | 17 | 15 |
F, female; M, male; VAS, Visual Analog Scale; WOMAC, Western Ontario and McMaster Universities Arthritis.