抄録
The neurological function of 100 patients who had undergone surgical treatment for cervical spondylotic myelopathy was reviewed in order to compare the validity of the revised Japanese Orthopaedic Association scoring systems for cervical myelopathy (“17-2”and“100”systems) to the original“17”scoring system. Each category in the“17-2”and“17”systems was also estimated as the proportion to 17 points. The scores in total as well as each category showed a highly significant correlation between the two systems. The motor function score in the upper extremities as well as the total score was significantly lower in the“17-2”system compared to the“17”system, because of the detailed evaluation of the shoulder and elbow function in the new system. Scores estimated from the“17”and“17-2”systems were significantly lower than the“100”system in total as well as motor and sensory functions. The recovery rates calculated based on the“17”and“17-2”systems were significantly correlated with differences less than 2%. The minimum transverse area of the spinal cord on T1-weighted MR images showed a high correlation with the score and recovery rate evaluated by any of the three scoring systems.
