A kyphosis is a spine curvature that is unusually convex. There are 81 rows and 4 columns in the kyphosis data frame. Data about children who have had corrective spinal surgery is represented. INPUTS: Age: in months Number: the number of vertebrae involved Start: the number of the first (topmost) vertebra operated on INPUTS: Age: in months Number: the number of vertebrae involved Number: the number of vertebrae involved Number: the number of vertebrae involved Number: the number of vertebrae involved Number: the number of vertebrae involved Number: the number of verte