Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,156 questions · 1,179 findings · 198 reviews · Headline outcomes only

No studies found 250 · 21.2%GRADE not reported 43 · 3.6%Very low 236 · 20%Low 395 · 33.5%Moderate 208 · 17.6%High 47 · 4%

Clonidine vs placebo or no treatment

Number requiring additional analgesia at any time postoperatively ‐ low dose clonidine · patients with postoperative pain

Clonidine showed no clear difference in number requiring additional analgesia at any time postoperatively ‐… compared with placebo or no treatment (low certainty).

1 finding from 1 review

High dose clonidine vs low dose clonidine

Number requiring additional analgesia required postoperatively ‐ moderate quality studies · patients with postoperative pain

High dose clonidine may leads to lower number requiring additional analgesia required postoperatively ‐… compared with low dose clonidine (low certainty).

1 finding from 1 review

Clonidine vs placebo or no treatment

Number requiring additional analgesia at any time postoperatively ‐ high dose clonidine · patients with postoperative pain

Clonidine probably leads to lower number requiring additional analgesia at any time postoperatively ‐… compared with placebo or no treatment (moderate certainty).

1 finding from 1 review