Table 3. The prognostic factor for the reduction of syringomyelia more than 50%.

^*Cut-off value was determined with ROC curve : sensitivity 66% and specificity 50%, ^†Cut-off value was determined with ROC curve : sensitivity 44% and specificity 43%, ^‡Chiari malformation type 1 without herniation of medulla oblongata was classified as group A and Chiari malformation type 1 with herniation of medulla oblongata was Group B. CI : confidence interval, ROC : receiver operating characteristic