There were 62 patients involved in the study who underwent either single- or two-level ACDF. The researchers followed the patients for two years. The researchers found:
1. There was a significant reduction in the Visual Analogue Scale and Neck Disability Index for both groups at the three month period and beyond.
2. There wasn’t a significant correlation between the global range of motion and the NDI or VAS for either group.
3. Researchers reported a significant reduction of global range of motion among the two-level spinal fusion patients one year after surgery, but not in the single-level group.
4. The upper adjacent segment range of motion did experience a significant interaction effect, but the lower adjacent segment did not.
5. The results showed the two-level group had a greater range of motion and increased upper adjacent segmental compensatory motions independent of patient-perceived recovery.
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