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Table 2 Imaging analyses

From: Segmental motion at the peak of the ossification foci is independent risk factor except for mal-alignment and thick ossification foci for poor outcome after laminoplasty for cervical ossification of the posterior longitudinal ligament: analyses in patients with positive K-line, lordotic alignment, and lower canal occupying ratio

Imaging analyses  
Type of ossification of the posterior longitudinal ligament (OPLL)  
 Continuous 1 case
 Mixed 39 cases
 Segmental 27 cases
 Local 5 cases
Maximum occupation ratio (%) 44.7 ± 11.8
Pre-op. C2-7 angle (degree) 11.5 ± 8.8
Pre-op. segmental range of motion (ROM) at peak of OPLL (degree) 5.2 ± 3.9