Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

334 questions · 707 findings · 50 reviews

No studies found 3 · 0.4%GRADE not reported 667 · 94.3%Very low 31 · 4.4%Low 4 · 0.6%Moderate 2 · 0.3%High 0 · 0%

Prenatal passive tobacco exposure (maternal smoking during pregnancy / in the womb) vs No passive tobacco exposure (non-exposed children)

Caries presence in primary teeth · Young children with primary (deciduous) dentition (aged 1 to 6 years at study start)

Prenatal (in-womb) tobacco exposure is associated with higher odds of caries in primary dentition (pooled OR 1.46, 95% CI 1.41 to 1.52; 4 studies; no heterogeneity); certainty not graded.

1 finding from 1 review

High-frequency sugar consumption (three or more times daily) vs Low sugar intake (fewer than three times daily)

Dental caries in permanent teeth · Nigerian individuals with permanent dentition (approximately 12 years and older)

In permanent dentition, high-frequency sugar consumption was associated with non-significant 15% higher odds of caries (OR 1.15, 95% CI 0.88 to 1.52), with no heterogeneity (I2=0%; ungraded).

1 finding from 1 review

Postnatal passive tobacco exposure (secondhand/household smoke in infancy) vs No passive tobacco exposure (non-exposed children)

Dental caries in permanent teeth · Children and adolescents with permanent dentition

Postnatal (infancy) tobacco exposure is associated with higher odds of caries in permanent dentition (pooled OR 1.30, 95% CI 1.25 to 1.34; 9 studies; no heterogeneity); certainty not graded.

1 finding from 1 review

Prenatal passive tobacco exposure (maternal smoking during pregnancy / in the womb) vs No passive tobacco exposure (non-exposed children)

Dental caries in permanent teeth · Children and adolescents with permanent dentition

No eligible studies examined prenatal tobacco exposure and caries in permanent dentition.

1 finding from 1 review

Overweight/obesity (combined) vs Normal Weight or Non‐Obese

Dental caries prevalence · Brazilian children/adolescents in permanent dentition (BMI classified by CDC 2000 growth charts)

The evidence is very uncertain about the effect of overweight/obesity on caries odds in the permanent dentition (very low certainty).

1 finding from 1 review

Overweight/obesity (combined) vs Normal Weight or Non‐Obese

Dental caries prevalence · Brazilian children/adolescents in permanent dentition (BMI classified by WHO 2006 Z-score)

A meta-analysis of 2 studies (permanent dentition, WHO 2006 Z-score) was rated very low certainty; the pooled effect was not shown in the article.

1 finding from 1 review

Obesity (Unclassified) vs Normal Weight or Non‐Obese

Dental caries prevalence · Brazilian children/adolescents in permanent dentition (BMI classified by CDC 2000 growth charts)

Normal-weight adolescents in the permanent dentition probably have greater odds of dental caries than obese peers (OR 2.53; moderate certainty).

1 finding from 1 review

Overweight/obesity (combined) vs Normal Weight or Non‐Obese

Dental caries prevalence · Brazilian children under 5 years in primary dentition (BMI classified by WHO 2006 Z-score)

The evidence is very uncertain about the effect of overweight/obesity on caries odds in the primary dentition (WHO 2006 Z-score; very low certainty).

1 finding from 1 review

Obesity (Unclassified) vs Normal Weight or Non‐Obese

Dental caries prevalence · Brazilian children in primary dentition (BMI classified by CDC 2000 growth charts)

The evidence is very uncertain about the effect of obesity on caries odds in the primary dentition (very low certainty).

1 finding from 1 review

Overweight/obesity (combined) vs Normal Weight or Non‐Obese

Dental caries prevalence · Brazilian children/adolescents (BMI classified by WHO 2007 percentile)

The evidence is very uncertain about the effect of overweight/obesity on caries odds (WHO 2007 percentile; very low certainty).

1 finding from 1 review

Overweight/obesity (combined) vs Normal Weight or Non‐Obese

Dental caries prevalence · Brazilian children in primary dentition (BMI classified by CDC 2000 growth charts)

The evidence is very uncertain about the effect of overweight/obesity on caries odds in the primary dentition (very low certainty).

1 finding from 1 review

Non-syndromic cleft lip and palate (CLP) status and its oral microbiota (exposure/grouping) vs Children and adolescents aged 0-18 years without CLP (controls)

Dental caries · Children and adolescents aged 0-18 years with non-syndromic cleft lip and palate (CLP)

Pooling 3 studies, children/adolescents with CLP were about 2.03 times more likely to have dental caries than non-CLP controls (p<0.005; low heterogeneity), though most included studies were at high risk of bias; the evidence is ungraded.

1 finding from 1 review

Living with HIV and undergoing antiretroviral therapy (ART/HAART) vs Healthy HIV-negative controls

Dental caries prevalence · Children or adolescents

In permanent dentition, CLWH on ART had higher caries prevalence than healthy controls (OR 2.49, 95% CI 1.86 to 3.32; single study).

3 findings from 1 review