Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,262 questions · 2,405 findings · 248 reviews · Headline outcomes only

No studies found 507 · 21.1%GRADE not reported 93 · 3.9%Very low 657 · 27.3%Low 708 · 29.4%Moderate 387 · 16.1%High 53 · 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