Interspinous Spacer Implant in Patients with Lumbar Spinal Stenosis: Preliminary Results of a Multicenter, Randomized, Controlled Trial
Figure 16
Relationship of pretreatment back function with absolute back function improvement at 6 months. (a) Superion, (b) X-STOP. Data are reported as percentages and include values from pretreatment and from the final subject followup visit at or beyond 3 months. The horizontal line represents the absolute change threshold (15 percentage points) for clinical success. Subjects on or above this line achieved clinical success. The diagonal line represents the maximum achievable absolute improvement based on the pretreatment value.
