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Relationship between pain relief at 1 month and at 6 months
| Response at 1 month | Response at 6 months n (%) | Odds ratio (95% CI) | ||
| No | Yes | Missing | ||
| 30% Response | ||||
| No | 188 (55) | 49 (14) | 105 | 4.36 (2.61–7.28) |
| Yes | 44 (35) | 50 (40) | 30 | |
| 50% Response | ||||
| No | 261 (62) | 36 (9) | 105 | 5.08 (2.36–10.93) |
| Yes | 14 (29) | 20 (42) | 14 | |
