A condition in which a vertebra has lost its proper juxtaposition with an adjacent vertebra (to an extent less than a luxation) in such a way as to alter nerve function.
... under the age of 18, 5.0% from 18 to 24, 29.0% from 25 to 44, 24.2% from 45 to 64, and 12.7% who are 65 years of age or older. The median age is 39 years. For every ...