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What do systematic reviews say?

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Evidence found and GRADE certainty

3 questions · 3 findings · 2 reviews · Injuries · Headline outcomes only

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No studies found 0 · 0%GRADE not reported 1 · 33.3%Very low 1 · 33.3%Low 0 · 0%Moderate 1 · 33.3%High 0 · 0%

Hyperbaric oxygen vs Normobaric Oxygen (NBO)

Presence of symptoms or signs at time of primary analysis (4‐6 weeks) · patients with carbon monoxide poisoning

It is very uncertain whether hyperbaric Oxygen (HBO) changes presence of symptoms or signs at time of primary analysis (4‐6 weeks) compared with normobaric Oxygen (NBO) (very low certainty).

1 finding from 1 review

Intervention not reported

Death at any time in trial period case mortality count · Patients with acute traumatic brain injury

The intervention probably leads to lower death at any time in trial period case mortality count (moderate certainty).

1 finding from 1 review

Intervention not reported

Favourable outcome GOS <9 or similar · Patients with acute traumatic brain injury

The intervention showed no clear difference in favourable outcome GOS <9 or similar; GRADE not reported.

1 finding from 1 review