Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

412 questions · 450 findings · 63 reviews · Headline outcomes only

No studies found 91 · 20.2%GRADE not reported 34 · 7.6%Very low 151 · 33.6%Low 113 · 25.1%Moderate 50 · 11.1%High 11 · 2.4%

Hypnotherapy vs behavioural treatments or no treatment

Smoking cessation · people who smoke

It is very uncertain whether hypnotherapy changes hypnotherapy versus intensive behavioural interventions (not matched… compared with behavioural treatments or no treatment (very low certainty).

1 finding from 1 review

Hospital‐only intervention vs intervention that continues after hospital discharge

Pharmacotherapy + behavioural support vs neither · smoking cessation in hospitalised patients

Hospital‐only intervention leads to higher pharmacotherapy + behavioural support vs neither compared with intervention that continues after hospital discharge (high certainty).

1 finding from 1 review

Hospital‐only intervention vs intervention that continues after hospital discharge

Behavioural support ‐ asynchronous** · smoking cessation in hospitalised patients

It is very uncertain whether hospital‐only intervention changes behavioural support ‐ asynchronous** compared with intervention that continues after hospital discharge (very low certainty).

1 finding from 1 review

Hospital‐only intervention vs intervention that continues after hospital discharge

Behavioural support ‐ synchronous** · smoking cessation in hospitalised patients

Hospital‐only intervention showed no clear difference in behavioural support ‐ synchronous** compared with intervention that continues after hospital discharge (low certainty).

1 finding from 1 review

Group C cognitive behavioural therapy: cognitive behavioural therapy + supportive intervention vs non‐directive reflective listening + supportive intervention

Prodromal symptoms: transition to psychosis Endpoint data (events) · people in the prodromal stage of psychosis

It is very uncertain whether group C cognitive behavioural therapy: cognitive behavioural therapy… changes prodromal symptoms: transition to psychosis Endpoint data (events) compared with non‐directive reflective listening + supportive intervention (very low certainty).

1 finding from 1 review

Group C cognitive behavioural therapy: cognitive behavioural therapy + supportive intervention vs non‐directive reflective listening + supportive intervention

Satisfaction with treatment: leaving the study early Endpoint data (events) · people in the prodromal stage of psychosis

It is very uncertain whether group C cognitive behavioural therapy: cognitive behavioural therapy… changes satisfaction with treatment: leaving the study early Endpoint data… compared with non‐directive reflective listening + supportive intervention (very low certainty).

1 finding from 1 review

Evidence‐based psychological interventions vs any comparator

Diagnosis of depression · Children or adolescents

Evidence‐based psychological interventions probably leads to lower evidence‐based psychological interventions versus any comparator… compared with any comparator (moderate certainty).

3 findings from 1 review