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Table 5 Comparison of fluoride concentrations in mg/L across communities with low and high fluoridation concentrations in Northern California and Canada

From: Maternal and fetal exposures to fluoride during mid-gestation among pregnant women in northern California

 

Community water fluoride <=0.3 mg/L (Mean ± SD)

Commuunity water fluoride (> 0.3 mg/L) (Mean ± SD)

Fluoride concentrations

Canada

Northern California (N = 17)

Canada

Northern California (N = 31)

Water

0.12 ± 0.06

0.099 ± 0.076

0.61 ± 0.11

0.71 ± 0.18

*

Maternal urine

 

0.46 ± 0.20

 

0.72 ± 0.43

*

Maternal urine adjusted for specific gravity

0.41 ± 0.28

0.45 ± 0.18

0.71 ± 0.38

0.74 ± 0.38

*

  1. * The Northern California high fluoridation mean concentration is significantly different from the Northern California low fluoridation mean concentration at the 0.01 confidence level using Welch’s t-test
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Environmental Health

ISSN: 1476-069X