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What do systematic reviews say?

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Evidence found and GRADE certainty

65 questions · 153 findings · 37 reviews · asked by two or more reviews

No studies found 32 · 20.9%GRADE not reported 25 · 16.3%Very low 28 · 18.3%Low 43 · 28.1%Moderate 24 · 15.7%High 1 · 0.7%

Early childhood caries (ECC) vs Caries-free controls

Relative abundance of Veillonella spp. · Young children with early childhood caries and caries-free controls

Veillonella spp. mean relative abundance was higher in ECC children, without a comparative effect estimate or CI.

4 findings from 2 reviews · compare the 2 reviews
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Mineral trioxide aggregate (MTA) vs Calcium hydroxide (CH)

Overall success (composite of clinical and radiographic success) · Permanent teeth with carious pulp exposure

In partial pulpotomy, MTA had significantly higher success than calcium hydroxide (OR 2.81; ungraded).

5 findings from 2 reviews · compare the 2 reviews
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Maternal smoking during pregnancy vs No maternal smoking during pregnancy

Dental caries · children

Maternal smoking during pregnancy was associated with higher odds of dental caries in children (OR 1.78, 95% CI 1.55 to 2.05; ungraded).

14 findings from 2 reviews · compare the 2 reviews
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SGLT2 inhibitors vs placebo

Death (all causes) · people with diabetes and CKD

Sodium‐glucose co‐transporter protein 2 (SGLT2) inhibitors leads to lower all‐cause death median compared with placebo (high certainty).

2 findings from 2 reviews · compare the 2 reviews

CBT vs TAU

AEs · chronic pain (excluding headache) in adults
3 findings from 2 reviews · compare the 2 reviews

CBT vs TAU

Reduction in pain intensity · chronic pain (excluding headache) in adults

It is very uncertain whether CBT changes pain intensity (number of people with ≥ 30 % improvement)… compared with TAU (at follow‐up) (very low certainty).

2 findings from 2 reviews · compare the 2 reviews

Self‐management interventions vs usual care

Respiratory‐related hospital admissions · patients with chronic obstructive pulmonary disease

It is very uncertain whether self‐management interventions changes respiratory‐related hospital admissions compared with usual care (very low certainty).

2 findings from 2 reviews · compare the 2 reviews

Self‐management interventions vs usual care

Respiratory‐related mortality · patients with chronic obstructive pulmonary disease

Self‐management interventions showed no clear difference in respiratory‐related mortality compared with usual care (low certainty).

2 findings from 2 reviews · compare the 2 reviews

Self‐management interventions vs usual care

All‐cause mortality · patients with chronic obstructive pulmonary disease

Self‐management interventions showed no clear difference in all‐cause mortality compared with usual care (low certainty).

2 findings from 2 reviews · compare the 2 reviews

Self‐management interventions vs usual care

Hospital admissions · patients with chronic obstructive pulmonary disease

Self‐management interventions showed no clear difference in all‐cause hospital admissions compared with usual care (moderate certainty).

2 findings from 2 reviews · compare the 2 reviews

Self‐management interventions vs usual care

COPD exacerbations · patients with chronic obstructive pulmonary disease
2 findings from 2 reviews · compare the 2 reviews

Skim milk enriched with GMP/G600 vs skim milk & lactose powder

Withdrawals due to adverse events · people with chronic gout

Skim milk enriched with GMP/G600 showed no clear difference in study withdrawals due to adverse events compared with skim milk, plus lactose powder (low certainty).

2 findings from 2 reviews · compare the 2 reviews

Summary of findings: insulin detemir vs NPH insulin

All‐cause mortality
2 findings from 2 reviews · compare the 2 reviews

Summary of findings: insulin detemir vs NPH insulin

Health‐related quality of life
2 findings from 2 reviews · compare the 2 reviews

Summary of findings: insulin detemir vs NPH insulin

HbA1c (%)
2 findings from 2 reviews · compare the 2 reviews

iMRI image‐guided surgery vs surgery

Adverse events · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews