Dental caries · School children aged 11-17 years in Sharjah
Higher paternal education was associated with lower DMFT.
1 finding from 1 review
Oral health-related quality of life · people aged 60 years and older living in the community
No statistically significant difference in OHRQoL was reported by edentulism prevalence.
1 finding from 1 review
Dental caries in children · Children (approx. 4-18 years)
Waist circumference was not significantly associated with childhood dental caries (pooled OR 1.08, 95% CI 0.90 to 1.30; I2=47.7%); ungraded.
1 finding from 1 review
Oral health-related quality of life · people aged 60 years and older living in the community
The review reported higher OHRQoL in the low than high dental-caries-prevalence category.
1 finding from 1 review
71.40 [64.16, 78.63]
Studies not reported
GRADE not reported
Sites with attachment loss greater than 3 mm · Humans with salivary S. mutans measured
High salivary S. mutans was not associated with a clear difference in sites with attachment loss greater than 3 mm.
1 finding from 1 review
OR 0.74 [0.35, 1.60]
1 study
GRADE not reported
Poor oral health-related quality of life (OHRQoL) · Children aged 3-12 years
Higher dental caries experience was associated with substantially higher odds of poor OHRQoL (OR 1.66, 95% CI 1.43-1.88; 6 studies; high heterogeneity I2=83.5%; ungraded).
1 finding from 1 review
OR 1.66 [1.43, 1.88]
6 studies
GRADE not reported
Oral health-related quality of life · people aged 60 years and older living in the community
No statistically significant difference in OHRQoL was reported by periodontal-disease prevalence.
1 finding from 1 review
Early childhood caries (ECC) · Children aged 0-5 years in North Africa
Paternal tertiary education was associated with lower odds of ECC (OR 0.381).
3 findings from 1 review
OR 0.381 [0.16, 0.91]
1 study
GRADE not reported
OR 0.083 [0.03, 0.21]
1 study
GRADE not reported
OR 0.797 [0.171, 0.650]
1 study
GRADE not reported
Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)
In the mandible, mean patient age was not significantly associated with space closure odds (OR 0.59 per year; not GRADE-rated).
1 finding from 1 review
Salivary S. mutans level · Humans with salivary bacteria measured
Salivary F. nucleatum and Actinobacillus levels were not associated with a clear difference.
1 finding from 1 review
OR 2.39 [1.00, 5.71]
1 study
GRADE not reported
Oral health-related quality of life · Adolescents (10-19 years)
Higher parental education is associated with better OHRQoL in adolescents (narrative synthesis; no pooled estimate or GRADE rating).
1 finding from 1 review
Alzheimer’s disease · Participants in observational studies
The meta-analysis of observational studies reported a SMD (to OR) of 0.08 (95% CI 0.01 to 0.63) for higher versus lower circulating vitamin D concentration.
1 finding from 1 review
Aggressive prostate cancer · Participants in observational studies
The meta-analysis of observational studies reported a OR of 0.88 (95% CI 0.68 to 1.15) for higher versus lower circulating vitamin D concentration.
1 finding from 1 review
Tuberculosis · Participants in observational studies
The meta-analysis of observational studies reported a SMD (to OR) of 0.29 (95% CI 0.19 to 0.46) for higher versus lower circulating vitamin D concentration.
1 finding from 1 review
Fracture · Participants in observational studies
The meta-analysis of observational studies reported a SMD (to OR) of 0.31 (95% CI 0.23 to 0.42) for higher versus lower circulating vitamin D concentration.
1 finding from 1 review
All cause mortality (in CKD patients) · Participants in observational studies
The meta-analysis of observational studies reported a RR of 0.88 (95% CI 0.81 to 0.93) for higher versus lower circulating vitamin D concentration.
1 finding from 1 review
Fracture · general population
Non-linear positive dose-response: little change in overall fracture risk below ~1.5 mg/L drinking-water fluoride, with risk increasing above that threshold (RR 1.06, 1.19, 1.35 at 2.0, 3.0, 4.0 mg/L vs null); ungraded (4 studies).
4 findings from 1 review
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride 1.2 mg/L vs null
RR 1.00 [0.80, 1.24]
4 studies
GRADE not reported
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride 4.0 mg/L vs null
RR 1.35 [0.94, 1.95]
4 studies
GRADE not reported
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride 3.0 mg/L vs null
RR 1.19 [0.87, 1.64]
4 studies
GRADE not reported
Show 1 more finding
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride 2.0 mg/L vs null
RR 1.06 [0.80, 1.41]
4 studies
GRADE not reported
Risk of femoral fractures · general population
Femoral-fracture risk was mildly U-shaped: RR 0.86 at 0.5 mg/L rising to 1.06 at 1.8 mg/L drinking-water fluoride vs null; risk mostly below null across the range; ungraded.
2 findings from 1 review
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride 1.8 mg/L vs null
RR 1.06 [0.67, 1.69]
Studies not reported
GRADE not reported
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride 0.5 mg/L vs null
RR 0.86 [0.71, 1.05]
Studies not reported
GRADE not reported
Risk of fragility fractures · Male participants
In males (7 studies), fragility-fracture risk generally decreased with increasing fluoride: RR 0.83 (95% CI 0.72-0.97) at 0.57 mg/L to 0.87 (0.48-1.58) at 1.8 mg/L vs null; ungraded.
2 findings from 1 review
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Males: drinking-water fluoride 1.8 mg/L vs null
RR 0.87 [0.48, 1.58]
7 studies
GRADE not reported
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Males: drinking-water fluoride 0.57 mg/L vs null
RR 0.83 [0.72, 0.97]
7 studies
GRADE not reported
Risk of fragility fractures · general population
Fragility-fracture risk overall was slightly U-shaped: RR 0.93 up to 0.9 mg/L, ~1.00 at 1.48 mg/L, 1.05 at 1.8 mg/L drinking-water fluoride vs null; ungraded.
5 findings from 1 review
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride up to 0.9 mg/L vs null
RR 0.93 [0.84, 1.02]
Studies not reported
GRADE not reported
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride 1.8 mg/L vs null
RR 1.05 [0.82, 1.35]
Studies not reported
GRADE not reported
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Sensitivity (excluding high risk-of-bias studies): 0.8-1.5 mg/L vs null
RR 0.93 [0.72, 1.21]
Studies not reported
GRADE not reported
Show 2 more findings
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Drinking-water fluoride 1.48 mg/L vs null
RR 1.00 [0.82, 1.21]
Studies not reported
GRADE not reported
The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomesLong-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Sensitivity (excluding high risk-of-bias studies): 1.8 mg/L vs null
RR 0.95 [0.70, 1.29]
Studies not reported
GRADE not reported