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Evidence found and GRADE certainty

11 questions · 15 findings · 1 reviews

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No studies found 0 · 0%GRADE not reported 15 · 100%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

External control of fluoride concentration vs Not applicable

Water samples with fluoride concentration outside the acceptable range · Brazilian cities with artificially fluoridated public water supplies

After excluding Silva et al., the pooled prevalence outside the acceptable range was 47.1%.

1 finding from 1 review

External control of fluoride concentration vs Not applicable

Water samples with fluoride concentration below the acceptable range · Brazilian cities in the Southeast region with artificially fluoridated public water supplies

In the Southeast region, 24.6% of samples were below the acceptable range.

1 finding from 1 review

External control of fluoride concentration vs Not applicable

Water samples with fluoride concentration above the acceptable range · Brazilian cities in the Northeast region with artificially fluoridated public water supplies

In the Northeast region, 0.2% of samples were above the acceptable range.

1 finding from 1 review

Fluoride concentration relative to the acceptable range (electrometric ion-selective electrode measurement; acceptable range mostly 0.6-0.8 ppmF) vs None (descriptive proportion meta-analysis)

Water samples with fluoride concentration below the acceptable range · Artificially fluoridated public water supply in Brazilian cities (water samples under external control)

In the Northeast Brazilian region, a pooled 79.7% of water samples had fluoride below the acceptable range; ungraded.

2 findings from 1 review

Fluoride concentration relative to the acceptable range (electrometric ion-selective electrode measurement; acceptable range mostly 0.6-0.8 ppmF) vs None (descriptive proportion meta-analysis)

Water samples with fluoride concentration above the acceptable range · Artificially fluoridated public water supply in Brazilian cities (water samples under external control)

In the Southeast Brazilian region, a pooled 11.5% of water samples had fluoride above the acceptable range; ungraded.

2 findings from 1 review

Fluoride concentration relative to the acceptable range (electrometric ion-selective electrode measurement; acceptable range mostly 0.6-0.8 ppmF) vs None (descriptive proportion meta-analysis)

Water samples with fluoride concentration outside the acceptable range · Artificially fluoridated public water supply in Brazilian cities (water samples under external control)

In Brazilian cities using external control, more than half of artificially fluoridated public water supply samples (pooled 56.6%, 95% CI 45.5 to 67.3) had fluoride concentrations outside the acceptable range, with very high heterogeneity (I2=99.5%); ungraded.

3 findings from 1 review