Success Criteria
The Clinical Events Committee (CEC) independently determined if an adverse event (AE) was a major complication. If so, the study subject was considered a failure.
Results
Two-level AEs Deemed to be a Major Complication
| Major Complications Determined Via CEC Review of Adverse Events (Two-level) |
| Treatment Group |
Adverse Event by Subject |
Fusion
(n=105) |
Pseudoarthrosis |
| Worsening arm pain |
| Worsening neck pain |
| Vocal cord paralysis |
| Dysphagia |
| Degenerative disc disease |
Mobi-C
(n=234) |
Recurrent arm pain |
| Adjacent disc herniation |
| Recurrent neck pain |
| Poor function of device and poor attachment to the bone |
| Dislodged device at C5-C6 (migration of >3 mm) |
| Impaired light touch |
| Dysphagia |
| Headache |
| Shoulder pain |