Percentage of patients with ≥30% and ≥50% pain reduction after conventional and cooled RF treatment
| OA | PPSP | Whole group | |||||||
| Conv RF, n (%) | Cooled RF, n (%) | P value* † | Conv RF, n (%) | Cooled RF, n (%) | P value† ‡ | Conv RF, n (%) | Cooled RF, n (%) | P value† § | |
| ≥50% pain reduction compared with baseline | |||||||||
| 1 month | 5/12 (41.7) | 6/12 (50) | 1.00 | 2/12 (16.7) | 3/12 (25) | 1.00 | 7/24 (29.2) | 9/24 (37.5) | 0.54 |
| 3 months | 3/12 (25) | 4/12 (33.3) | 1.00 | 1/11 (9.1) | 4/12 (33.3) | 0.32 | 4/23 (17.4) | 8/24 (33.3) | 0.21 |
| 6 months | 3/11 (27.3) | 4/12 (33.3) | 1.00 | 1/11 (9.1) | 5/12 (41.7) | 0.16 | 4/22 (18.2) | 9/24 (37.5) | 0.15 |
| ≥30% pain reduction compared with baseline | |||||||||
| 1 month | 6/12 (50) | 7/12 (58.3) | 0.68 | 4/12 (33.3) | 6/12 (50) | 0.41 | 10/24 (41.7) | 13/24 (54.2) | 0.39 |
| 3 months | 5/12 (41.7) | 8/12 (66.7) | 0.22 | 2/11 (18.2) | 6/12 (50) | 0.19 | 7/23 (30.4) | 14/24 (58.3) | 0.05 |
| 6 months | 4/11 (36.4) | 5/12 (41.7) | 1.00 | 1/11 (9.1) | 5/12 (41.7) | 0.16 | 5/22 (22.7) | 10/24 (41.7) | 0.17 |
*P value compares conventional RF versus cooled RF procedure in the OA group.
†Pearson’s χ2 test used to compare proportions.
‡P value compares conventional RF versus cooled RF procedure in the PPSP group.
§P value compares conventional RF versus cooled RF procedure in the whole population.
OA, osteoarthritis; PPSP, persistent postsurgical pain; RF, radiofrequency ablation.