Table 2.
Bivariate analysis of predictor variables and dentin fluoride concentration, mg/kg by tooth type
| Category | Incisors | Molars | ||||
|---|---|---|---|---|---|---|
| n | mean (95% CI) | n | mean (95% CI) | |||
| Fluoride exposures | Optimal water (average ≥ 0.04 mg/kg/day) | No | 29 | 763 (587-938) | 24 | 739 (497-982) |
| Yes | 32 | 819 (695-944) | 14 | 816(637-994) | ||
| Optimal toothpaste (at least 2 times per day) | No | 39 | 792 (652-932) | 28 | 817(609-1,025) | |
| Yes | 22 | 792 (635-949) | 10 | 629 (413-844) | ||
| Optimal supplements (at least 5 days per week) | No | 58 | 792 (686-898) | 37 | 715 (591-840) | |
| Yes | 3 | 793 (−373 to 1,959) | 1 | 2,699 (−) | ||
| Prenatal fluoride (water ≥0.7 mg/1) | No | 29 | 728 (610-845) | 23 | 736 (482-991) | |
| Yes | 32 | 851 (682-1,020) | 15 | 816 (654-977) | ||
| School fluoride rinse (ever used) | No | 30 | 766 (590-942) | 14 | 765 (491-1,039) | |
| Yes | 31 | 818 (698-938) | 24 | 769 (554-983) | ||
| Diet | Frequent tea consumption | No | 47 | 780 (659-901) | 28 | 682 (498-866) |
| Yes | 14 | 833 (613-1,054) | 10 | 1,007 (667-1,346) | ||
| Frequent soda consumption | No | 49 | 813 (689-936) | 18 | 850(531-1,169) | |
| Yes | 12 | 710 (542-878) | 20 | 694(557-830) | ||
| Frequent fish consumption | No | 56 | 778 (673-884) | 36 | 774 (605-943) | |
| Yes | 5 | 950(311-1,589) | 2 | 651 (−1,522 to 2,824) | ||
| Demographics | Race | White | 56 | 801 (692-910) | 33 | 816 (638-993) |
| Nonwhite | 5 | 694(253-1,135) | 5 | 450 (144-755) | ||
| Sex | Male | 28 | 796 (618-973) | 20 | 708 (572-845) | |
| Female | 33 | 589 (663-915) | 18 | 833(512-1,155) | ||
| Residency city | Asheville | 20 | 770 (644-895) | 10 | 1,204(711-1,698)∗∗ | |
| Lenoir | 17 | 818(612-1023) | 14 | 586 (436-737) | ||
| Jackson | 4 | 372 (200-543)∗ | 5 | 398 (222-575) | ||
| Hendersonville | 20 | 878(640-1,115) | 9 | 769 (564-975) | ||
∗
Significant at the 5% level;
∗∗
Significant at the 0.1% level.