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Lumbar surgical outcomes in 3 regions of Maine, according to surgical rates in each area
| Low rate area | Middle rate area | High rate area | |
|---|---|---|---|
| Improvement in Roland score* | 13 | 11 | 8 |
| Disability compensation | 8% | 10% | 18% |
| Satisfied with outcome* | 72% | 63% | 49% |
Follow-up was 2–4 years for all patients
*p < 0.05
Ref. [11]
