Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

477 questions · 520 findings · 39 reviews · Back and Neck

No studies found 91 · 17.5%GRADE not reported 14 · 2.7%Very low 137 · 26.3%Low 149 · 28.7%Moderate 104 · 20%High 25 · 4.8%

Summary of findings: bilateral laminotomy vs conventional laminectomy

Disability Long‐term (≥ 12 months) Disability scores converted to 0 to 100 scale to allow for comparison of different disability scales (RMDQ, ODI, JOA) · patients with lumbar stenosis

It is very uncertain whether summary of findings: bilateral laminotomy changes standardized Disability Index (0 to 100) Bilateral laminotomy… compared with conventional laminectomy (very low certainty).

1 finding from 1 review

Summary of findings: split‐spinous process laminotomy vs conventional laminectomy

Disability Long‐term (≥ 12 months) Disability scores converted to 0 to 100 scale to allow for comparison of different disability scales (RMDQ, ODI, JOA) · patients with lumbar stenosis

Summary of findings: split‐spinous process laminotomy showed no clear difference in standardised Disability Index (0 to 100) Split‐spinous process… compared with conventional laminectomy (low certainty).

1 finding from 1 review

Summary of findings: unilateral laminotomy vs conventional laminectomy

Disability Long‐term (≥ 12 months) Disability scores converted to 0 to 100 scale to allow for comparison of different disability scales (RMDQ, ODI, JOA) · patients with lumbar stenosis

Summary of findings: unilateral laminotomy showed no clear difference in standardised Disability Index (0 to 100) Unilateral laminotomy… compared with conventional laminectomy (low certainty).

1 finding from 1 review