Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,736 questions · 15,265 findings · 1,163 reviews · Headline outcomes only

No studies found 3,871 · 25.4%GRADE not reported 810 · 5.3%Very low 4,242 · 27.8%Low 3,879 · 25.4%Moderate 1,999 · 13.1%High 464 · 3%

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Intervention not reported

Serious adverse events for all placebos compared with wait‐list or no treatment (Spontaneous reporting of dichotomous outcomes) (Post‐treatment) · patients with mental health disorders

It is very uncertain whether the intervention changes serious adverse events for all placebos compared with wait‐list or… (very low certainty).

1 finding from 1 review

Intervention not reported

Invitation versus control: uptake of screening · women for cervical screening

The intervention probably leads to higher invitation versus control: uptake of screening (moderate certainty).

1 finding from 1 review

Intervention not reported

GP invitation letter versus invitation letter from other authority sources: uptake of screening · women for cervical screening

It is very uncertain whether the intervention changes GP invitation letter versus invitation letter from other authority… (very low certainty).

1 finding from 1 review

Intervention not reported

Personal invitation versus invitation letter: uptake of screening · women for cervical screening

The intervention may leads to higher personal invitation versus invitation letter: uptake of screening (low certainty).

1 finding from 1 review

Intervention not reported

Letter with fixed appointment versus letter with open invitation to make appointment: uptake of screening · women for cervical screening

The intervention probably leads to higher letter with fixed appointment versus letter with open invitation to… (moderate certainty).

1 finding from 1 review

Intervention not reported

Counselling versus control: uptake of screening · women for cervical screening

It is very uncertain whether the intervention changes counselling versus control: uptake of screening (very low certainty).

1 finding from 1 review

Intervention not reported

Counselling versus other: uptake of screening · women for cervical screening

It is very uncertain whether the intervention changes counselling versus other: uptake of screening (very low certainty).

1 finding from 1 review

Intervention not reported

Education versus control: uptake of screening · women for cervical screening

The intervention may leads to higher education versus control: uptake of screening (low certainty).

1 finding from 1 review

Prism adaptation training vs control

Neglect outcomes: immediate effects · spatial neglect or inattention following stroke and other adult‐acquired non‐progressive brain injury

It is very uncertain whether prism adaptation training changes neglect outcomes: immediate effects compared with any control (very low certainty).

1 finding from 1 review

NIBS vs control

Neglect outcomes: immediate effects · spatial neglect or inattention following stroke and other adult‐acquired non‐progressive brain injury

It is very uncertain whether NIBS changes neglect outcomes: immediate effects compared with any control (very low certainty).

1 finding from 1 review