Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,052 questions · 1,797 findings · 134 reviews

No studies found 10 · 0.6%GRADE not reported 1,630 · 90.7%Very low 95 · 5.3%Low 23 · 1.3%Moderate 22 · 1.2%High 17 · 0.9%

Dental fluorosis assessment vs None (descriptive prevalence review; subgroup analyses by urban/rural status, country and year)

Dental fluorosis prevalence · School-aged children in the United Arab Emirates (Dubai)

One study reported dental fluorosis in 10.9% of school-aged children in Dubai, mostly very mild or mild (narrative synthesis; not GRADE-rated).

1 finding from 1 review

Tooth wear assessment (primary teeth) vs None (descriptive prevalence review; subgroup analyses by urban/rural status, country and year)

Tooth wear prevalence · School children (primary dentition) in the United Arab Emirates (Abu Dhabi)

One study reported a very high prevalence of tooth wear (97.6%) in the primary dentition of school children in Abu Dhabi, associated with older age, mouth breathing and anterior deep bite (narrative synthesis; not GRADE-rated).

1 finding from 1 review

Placebo rinse vs Pre-treatment (baseline, same group)

Lactobacillus count (pre- vs post-treatment) · Medically healthy individuals (adults and children, 6-60 years)

Placebo rinse did not significantly change Lactobacillus counts relative to baseline; not GRADE-rated.

1 finding from 1 review

Salvadora persica (miswak) mouthrinse vs Pre-treatment (baseline, same group)

Lactobacillus count (pre- vs post-treatment) · Medically healthy individuals (adults and children, 6-60 years)

Salvadora persica rinse reduced Lactobacillus counts relative to baseline; not GRADE-rated.

1 finding from 1 review

Salvadora persica (miswak) mouthrinse vs Pre-treatment (baseline, same group)

Streptococcus mutans count · Medically healthy individuals (adults and children, 6-60 years)

Salvadora persica rinse reduced Streptococcus mutans counts relative to baseline; not GRADE-rated.

1 finding from 1 review

Chlorhexidine 0.12% mouthrinse vs Pre-treatment (baseline, same group)

Plaque · Medically healthy individuals (adults and children, 6-60 years)

0.12% chlorhexidine rinse reduced plaque relative to baseline; not GRADE-rated.

1 finding from 1 review

Salvadora persica (miswak) mouthrinse vs Pre-treatment (baseline, same group)

Plaque · Medically healthy individuals (adults and children, 6-60 years)

Salvadora persica rinse reduced plaque relative to its own baseline; not GRADE-rated.

1 finding from 1 review

Placebo rinse vs Pre-treatment (baseline, same group)

Streptococcus mutans count · Medically healthy individuals (adults and children, 6-60 years)

Placebo rinse did not significantly change Streptococcus mutans counts relative to baseline; not GRADE-rated.

1 finding from 1 review

Chlorhexidine 0.2% vs Pre-treatment (baseline, same group)

Plaque · Medically healthy individuals (adults and children, 6-60 years)

0.2% chlorhexidine rinse reduced plaque relative to baseline; not GRADE-rated.

1 finding from 1 review

Higher maternal circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower maternal circulating 25-hydroxyvitamin D (25(OH)D) concentration

Pre‐eclampsia · pregnant women and their infants..

Meta-analysis of observational studies (higher vs lower maternal 25(OH)D) for Pre-eclampsia: OR 0.56 (95% CI 0.39 to 0.80), statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review