MCID threshold scores and achievement rates.
| Achievement, n (%) | ||||
| Outcome Measure | Threshold Score | Pre-STOP | Post-STOP | P |
| VAS back pain | 1.8 | 56 (72.7) | 36 (60) | 0.116 |
| VAS leg pain | 1.7 | 67 (82.7) | 51 (85) | 0.717 |
| EuroQol-Five Dimensions Index | 0.2 | 56 (72.7) | 44 (77.2) | 0.557 |
| Oswestry Disability Index | 11.7 | 63 (77.8) | 52 (86.7) | 0.178 |
| Achieved ≥1 MCID threshold | 81 (95.3) | 61(98.4) | 0.315 | |
Abbreviations: MCID, meaningful clinically important difference; STOP, Strengthen Opioid Misuse Prevention Act; VAS, visual analog scale.