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Pain severity and pain interference throughout the study period, according to Brief Pain Inventory (BPI) scores
| Baseline | 3 months | 12 months | |
|---|---|---|---|
| N = 328 | N = 305 | N = 274 | |
| Severity of pain (BPI1 score; mean and SD) | 6.5 (1.8) | 6.5 (2.4) | 6.4 (2.6) |
| Interference of pain (BPI1 score; mean and SD) | 6.3 (2.3) | 5.6 (2.5) | 5.5 (2.6) |
1Brief Pain Inventory, providing scores for both pain severity and pain interference
