Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

164 questions · 214 findings · 22 reviews

No studies found 3 · 1.4%GRADE not reported 161 · 75.2%Very low 25 · 11.7%Low 15 · 7%Moderate 8 · 3.7%High 2 · 0.9%

Secondary (passive/secondhand) smoking exposure during childhood vs No secondary smoking exposure

Caries prevalence (early childhood caries) · Preschool children aged <=71 months (caries outcome assessed at 3-6 years)

Preschool children exposed to secondary smoking have higher odds of caries prevalence (OR 1.77), but the cross-sectional evidence is very uncertain (very low certainty).

2 findings from 1 review

Secondary (passive/secondhand) smoking exposure during childhood vs No secondary smoking exposure

Early childhood caries (ECC) - incidence/risk · Preschool children aged <=71 months (caries outcome assessed at 3-6 years)

Children exposed to secondary smoking from infancy have a higher incidence of early childhood caries by age 3 (RR 1.45; low certainty).

1 finding from 1 review

Epilepsy (as exposure/condition) vs Healthy participants without epilepsy (control group)

Caries in primary teeth: dmft (3 years) · Children and adolescents with epilepsy

In children/adolescents, the dmft (primary teeth) index does not differ significantly with epilepsy (SMD 0.132, 95% CI -0.220 to 0.484, P = .463; ungraded subgroup).

1 finding from 1 review

Epilepsy (as exposure/condition) vs Healthy participants without epilepsy (control group)

Mean DMFT (decayed, missing, filled permanent teeth) · Children and adolescents with epilepsy

In children/adolescents, the higher DMFT with epilepsy is not statistically significant (SMD 0.334, 95% CI -0.140 to 0.827, P = .164; ungraded subgroup).

1 finding from 1 review

Epilepsy (as exposure/condition) vs Healthy participants without epilepsy (control group)

Mean DMFT (decayed, missing, filled permanent teeth) · people with epilepsy

People with epilepsy have a significantly higher DMFT (permanent-teeth caries) index than controls (SMD 0.403, 95% CI 0.057 to 0.749; high certainty).

1 finding from 1 review

Epilepsy (as exposure/condition) vs Healthy participants without epilepsy (control group)

Mean DMFT (decayed, missing, filled permanent teeth) · Adults with epilepsy

In adults, epilepsy is associated with a significantly higher DMFT than controls (SMD 0.548, P < .001; ungraded subgroup analysis).

1 finding from 1 review

Epilepsy (as exposure/condition) vs Healthy participants without epilepsy (control group)

Caries in primary teeth: dmft (3 years) · people with epilepsy

The dmft (primary-teeth caries) index does not differ significantly between people with epilepsy and controls (SMD 0.132, 95% CI -0.22 to 0.484; high certainty).

1 finding from 1 review

Moderate-severe active dental caries (exposure) vs Caries-free or mild dental caries (control)

Salivary IL-6 level (pg/mL) · Children and young adults (3-25 years)

Salivary IL-6 levels are significantly higher in children and young adults with active dental caries than in caries-free or mild-caries controls (SMD 11.60 pg/mL, 95% CI 6.27 to 16.94; 11 studies); ungraded.

1 finding from 1 review

Moderate-severe active dental caries (exposure) vs Caries-free or mild dental caries (control)

Salivary IL-8 level (pg/mL) · Children and young adults (3-25 years)

Salivary IL-8 levels are higher in children and young adults with active dental caries than in controls but the difference is not statistically significant (SMD 57.20 pg/mL, 95% CI -18.60 to 133.00; 7 studies); ungraded.

1 finding from 1 review

Moderate-severe active dental caries (exposure) vs Caries-free or mild dental caries (control)

TNF-α level · Children and young adults (3-25 years)

Salivary TNF-α levels are significantly higher in children and young adults with active dental caries than in caries-free or mild-caries controls (SMD 14.81 pg/mL, 95% CI 4.76 to 24.86; 7 studies); ungraded.

1 finding from 1 review

Food marketing exposure or greater marketing power vs No, less, or less powerful food marketing

Food choice · Children and adolescents (general population, aged under 20 years)

In crossover studies with binary outcomes, food marketing had no clear association with food choice (OR 3.45, 95% CI 0.97 to 12.43; ungraded).

1 finding from 1 review

Food marketing exposure or greater marketing power vs No, less, or less powerful food marketing

Food purchasing · Children and adolescents (general population, aged under 20 years)

Across five studies, 40% showed any association of potential public health harm for food purchasing (very low certainty).

1 finding from 1 review

Food marketing exposure or greater marketing power vs No, less, or less powerful food marketing

Dental caries · Children and adolescents (general population, aged under 20 years)

Across two studies, 50% showed any association of potential public health harm for dental caries (very low certainty).

1 finding from 1 review

Food marketing exposure or greater marketing power vs No, less, or less powerful food marketing

Food preference · Children and adolescents (general population, aged under 20 years)

In crossover studies with binary outcomes, food marketing increased food preference (OR 3.49, 95% CI 2.03 to 6.22; ungraded).

1 finding from 1 review

Dental caries (ECC/severe ECC) as exposure/grouping vs Caries-free controls

Relative abundance of S. mutans in saliva · Individuals assessed for dental caries, predominantly children with early childhood caries (ECC) or severe ECC (age about 1 to 4 years)

A few small studies report Streptococcus mutans relative abundance in caries versus caries-free children without pooling; the evidence is ungraded and not meta-analyzed.

1 finding from 1 review

Dental caries (ECC/severe ECC) as exposure/grouping vs Caries-free controls

Relative abundance of Veillonella spp. · Individuals assessed for dental caries, predominantly children with early childhood caries (ECC) or severe ECC (age about 1 to 4 years)

Evidence on whether Veillonella spp. relative abundance is higher or lower in children with dental caries than caries-free controls is inconsistent across 7 small observational studies; no pooled estimate was produced and the evidence is ungraded.

1 finding from 1 review

Food and nonalcoholic beverage marketing (exposure) vs No, less, or less powerful food marketing

Food intake · Children and adolescents (general population, aged under 20 years)

Food marketing was associated with a significant increase in children's food intake (pooled SMD, 0.25; combined RCT and nonrandomized evidence).

3 findings from 1 review

Food and nonalcoholic beverage marketing (exposure) vs No, less, or less powerful food marketing

Food preference · Children and adolescents (general population, aged under 20 years)

Food marketing was associated with increased food preference (pooled SMD, 0.30; combined evidence).

3 findings from 1 review

Food and nonalcoholic beverage marketing (exposure) vs No, less, or less powerful food marketing

Dental caries · Children and adolescents (general population, aged under 20 years)

Evidence on food marketing and dental caries is very uncertain (very low certainty); 1 of 2 studies found an association.

1 finding from 1 review