Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

90 questions · 93 findings · 20 reviews · Headline outcomes only

No studies found 8 · 8.6%GRADE not reported 3 · 3.2%Very low 26 · 28%Low 35 · 37.6%Moderate 19 · 20.4%High 2 · 2.2%

Any early psychological intervention vs inactive control (usual care care, attention control, waitlist)

Diagnosis of PTSD after treatment · various

It is very uncertain whether any early psychological intervention changes PTSD diagnosis: post‐treatment compared with waiting list/usual care (very low certainty).

1 finding from 1 review

Any early psychological intervention vs inactive control (usual care care, attention control, waitlist)

PTSD diagnosis · various

Any early psychological intervention may leads to lower PTSD diagnosis: 3–6 months compared with waiting list/usual care (low certainty).

2 findings from 1 review