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Evidence found and GRADE certainty

676 questions · 705 findings · 98 reviews · Headline outcomes only

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No studies found 183 · 26%GRADE not reported 47 · 6.7%Very low 209 · 29.6%Low 153 · 21.7%Moderate 85 · 12.1%High 28 · 4%

Summary of findings: bilateral laminotomy vs conventional laminectomy

Incidence of postoperative instability · patients with lumbar stenosis

Summary of findings: bilateral laminotomy may leads to lower incidence of postoperative instability compared with conventional laminectomy (low certainty).

1 finding from 1 review

Summary of findings: bilateral laminotomy vs conventional laminectomy

Incidence of perioperative complications · patients with lumbar stenosis

Summary of findings: bilateral laminotomy showed no clear difference in incidence of perioperative complications compared with conventional laminectomy (low certainty).

1 finding from 1 review

Summary of findings: unilateral laminotomy vs conventional laminectomy

Incidence of postoperative instability · patients with lumbar stenosis

Summary of findings: unilateral laminotomy showed no clear difference in incidence of postoperative instability compared with conventional laminectomy (low certainty).

1 finding from 1 review

Summary of findings: unilateral laminotomy vs conventional laminectomy

Incidence of perioperative complications · patients with lumbar stenosis

Summary of findings: unilateral laminotomy showed no clear difference in incidence of perioperative complications compared with conventional laminectomy (low certainty).

1 finding from 1 review

Summary of Findings Table ‐ Large retro‐equatorial recession of horizontal rectus muscle of 9 mm on the medial rectus and 12 mm on the lateral rectus vs simple tenotomy and resuturing of the 4 horizontal rectus muscles

Change in head posture ‐ not reported · infantile nystagmus syndrome

The review found no eligible studies for this question.

1 finding from 1 review

Summary of Findings Table ‐ Large retro‐equatorial recession of horizontal rectus muscle of 9 mm on the medial rectus and 12 mm on the lateral rectus vs simple tenotomy and resuturing of the 4 horizontal rectus muscles

Change in foveation period durations of the waveform ‐ not reported · infantile nystagmus syndrome

The review found no eligible studies for this question.

1 finding from 1 review

Summary of Findings Table ‐ Large retro‐equatorial recession of horizontal rectus muscle of 9 mm on the medial rectus and 12 mm on the lateral rectus vs simple tenotomy and resuturing of the 4 horizontal rectus muscles

Change in visual recognition times ‐ not reported · infantile nystagmus syndrome

The review found no eligible studies for this question.

1 finding from 1 review

Summary of Findings Table ‐ Large retro‐equatorial recession of horizontal rectus muscle of 9 mm on the medial rectus and 12 mm on the lateral rectus vs simple tenotomy and resuturing of the 4 horizontal rectus muscles

Change in proportion of participants with adverse effects with a probable causal link to the treatment · infantile nystagmus syndrome
1 finding from 1 review

Intervention not reported

Ulceration on the contralateral leg · people with healed venous leg ulcers
1 finding from 1 review

Magnesium sulphate vs placebo (outcomes

Death (fetal, neonatal, or later (up to 2 years' corrected age))** · women at risk of preterm birth (< 34 weeks' gestation)

Magnesium sulphate showed no clear difference in death (fetal, neonatal, or later (up to 2 years' corrected age))** compared with placebo (outcomes (moderate certainty).

1 finding from 1 review