Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,410 questions · 8,901 findings · 1,091 reviews

No studies found 1,687 · 19%GRADE not reported 1,469 · 16.5%Very low 1,969 · 22.1%Low 2,060 · 23.1%Moderate 1,302 · 14.6%High 414 · 4.7%

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Gum chewing (sugar-free) vs No chewing gum

Salivary flow rate (unstimulated) · Elderly (>60 years) and medically compromised adults with xerostomia / dry mouth

In elderly and medically compromised people with xerostomia, chewing sugar-free gum daily for two or more weeks produces a small but statistically significant increase in unstimulated whole salivary flow rate versus no gum (SMD 0.44, 95% CI 0.22 to 0.66); certainty of evidence was not formally graded.

1 finding from 1 review

Neutral / cushioned vs minimalist running shoes

Number of runners sustaining a lower‐limb running injurya ( · healthy adults participating in recreational running

Neutral / cushioned showed no clear difference in number of runners sustaining a lower‐limb running injurya ( compared with minimalist running shoes (low certainty).

1 finding from 1 review

Motion control vs neutral / cushioned running shoes

Number of runners sustaining a lower‐limb running injurya ( · healthy adults participating in recreational running

It is very uncertain whether motion control changes number of runners sustaining a lower‐limb running injurya ( compared with neutral / cushioned running shoes (very low certainty).

1 finding from 1 review

Lay health worker‐led psychological interventions vs usual care

Prevalence of CMDs ‐ intermediate term (1 to 6 months post intervention) Diagnosis defined by SRQ‐20 > 7b; PHQ‐9 ≥ 11d (RR < 1 denotes lower prevalence compared to control) · adults with common mental disorders

Lay health worker‐led psychological interventions may leads to lower prevalence of CMDs ‐ intermediate term (1 to 6 months post… compared with usual care (low certainty).

1 finding from 1 review

Lay health worker‐led psychological interventions vs usual care

Prevalence of PTSD · adults with post‐traumatic stress and CMDs

It is very uncertain whether lay health worker‐led psychological interventions changes prevalence of PTSD ‐ intermediate term (1 to 6 months) Diagnosis… compared with usual care (very low certainty).

1 finding from 1 review

Primary health professional‐led psychological interventions vs usual care or no treatment

Prevalence of adults with probable PTSD (1 to 6 months post intervention) Diagnosis defined by HTQ ≥ 1.75 (RR > 1 denotes lower prevalence compared to control) · adults with post‐traumatic stress or common mental disorders

Primary health professional‐led psychological interventions may leads to higher prevalence of adults with probable PTSD (1 to 6 months post… compared with usual or no care (low certainty).

1 finding from 1 review

Primary health professional‐led psychological interventions vs usual care or no treatment

Anxiety and depression · adults with post‐traumatic stress or common mental disorders

Primary health professional‐led psychological interventions may leads to higher prevalence of adults with probable depression or anxiety (1 to 6… compared with usual or no care (low certainty).

1 finding from 1 review

Lay health worker‐led interventions for adult patients with harmful or hazardous alcohol or substance use vs enhanced usual care

Prevalence of methamphetamine use (1 to 6 months post intervention) (RR < 1 denotes lower prevalence compared to control) · adult patients with harmful or hazardous alcohol or substance use

Lay health worker‐led interventions for adult patients with harmful… showed no clear difference in prevalence of methamphetamine use (1 to 6 months post intervention)… compared with enhanced usual care (low certainty).

1 finding from 1 review

Lay health worker‐led interventions for adult patients with harmful or hazardous alcohol or substance use vs enhanced usual care

Service utilisation ‐ unplanned hospitalisations (1 to 6 months post intervention) (RR < 1 denotes lower risk) · adult patients with harmful or hazardous alcohol or substance use

It is very uncertain whether lay health worker‐led interventions for adult patients with harmful… changes service utilisation ‐ unplanned hospitalisations (1 to 6 months post… compared with enhanced usual care (very low certainty).

1 finding from 1 review

Lay health worker‐led interventions for adult patients with harmful or hazardous alcohol or substance use vs enhanced usual care

Adverse events ‐ death in past 12 months (RR > 1 denotes higher risk of death) · adult patients with harmful or hazardous alcohol or substance use

It is very uncertain whether lay health worker‐led interventions for adult patients with harmful… changes adverse events ‐ deaths (RR < 1 denotes lower risk) compared with enhanced usual care (very low certainty).

1 finding from 1 review

Primary health professional‐ and community professional‐led interventions vs enhanced usual care

Cannabis use · adult patients with harmful or hazardous alcohol or substance use

It is very uncertain whether primary health professional‐ and community professional‐led… changes prevalence of cannabis use (1 to 6 months post intervention) (RR < 1… compared with enhanced usual care (very low certainty).

1 finding from 1 review

Lay health worker‐led psychological interventions vs usual care

Adverse events RR < 1 indicates lower risk of adverse events · adults with common mental disorders

Lay health worker‐led psychological interventions may leads to lower adverse events RR < 1 indicates lower risk of adverse events compared with usual care (low certainty).

1 finding from 1 review

Primary‐level worker‐led collaborative care vs usual care

Prevalence of CMD ‐ intermediate term (1 to 6 months post intervention) Diagnosis defined by presence of ICD‐10 diagnosis on CIS‐Rg; prevalence defined by [Total number ‐ number recovered (recovery defined by HDRS < 8)]c (RR < 1 denotes lower prev... · adults with common mental disorders

Primary‐level worker‐led collaborative care showed no clear difference in prevalence of CMD ‐ intermediate term (1 to 6 months post… compared with usual care (low certainty).

1 finding from 1 review