Table 1.

Data of Cervical Myelopathy Patients Treated by Laminoplasty

JOA: Japanese Orthopaedic Association Scoring System.

^*The number of segments with high signal change in the T2 images. ^†The level of segments with high signal change in the T2 images. ^‡Localized marginal pattern of segments with high signal changes in the T2 images. ^§Recovery ratio of surgery was graded using the Hirabayashi equation (preoperative score - postoperative score/17 - preoperative score × 100).