Interspinous Process Decompression: Expanding Treatment Options for Lumbar Spinal Stenosis

Figure 3

Within-group effect sizes calculated from the Superion IDE trial in contrast with comparable effect size extrapolated from the SPORT trial [5] for ODI outcomes at 2, 3, and 4 years of follow-up and from Strömqvist et al. [6] for ZCQ symptom severity (ss) and physical function (pf) at 2 years of follow-up.