The 2-Level Experience of Interlaminar Stabilization: 5-Year Follow-Up of a Prospective, Randomized Clinical Experience Compared to Fusion for the Sustainable Management of Spinal Stenosis

RACHEL B. SIMON; CHRISTINA DOWE; SAMUEL GRINBERG; FRANK P. CAMMISA; CELESTE ABJORNSON

doi:10.14444/5050

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Figure 1
Patient flowchart.
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Figure 2
Mean Oswestry Disability Index scores. *Significant difference between interlaminar stabilization (ILS) and fusion groups: 2 sample pooled t test P value = .023. †Significant difference between ILS baseline and follow-up: within-group paired t test. ◊Significant difference between fusion baseline and follow-up: within-group paired t test.
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Figure 3
(a) Mean Visual Analog Scale (VAS) back pain scores. (b) Mean VAS worse leg pain scores. *Significant difference between interlaminar stabilization (ILS) and fusion groups: 2 sample pooled t test P value = .035. †Significant difference between ILS baseline and follow-up: within-group paired t test. ◊Significant difference between fusion baseline and follow-up: within-group paired t test.
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Figure 4
(a) Mean Zurich Claudication Questionnaire (ZCQ) symptom severity scores. (b) Mean ZCQ physical function scores. (c) Mean ZCQ patient satisfaction scores. *Significant difference between interlaminar stabilization (ILS) and fusion groups for Physical Function: 2 sample pooled t test P value at week 6 = .039, at month 24 = .056. ‡Significant difference between ILS and fusion groups for Patient Satisfaction: 2 sample pooled t test P value at week 6 = .029, at month 24 = .009. †Significant difference between ILS baseline and follow-up: within-group paired t test. ◊Significant difference between fusion baseline and follow-up: within-group paired t test.