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

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

	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	*

* 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

ISSN: 1476-069X