Table 1.
Basic characteristics of study sample
| Variables | n (%) or mean ± SD |
|---|---|
| Sex | |
| Male | 504 (55.45) |
| Female | 405 (44.55) |
| Recruitment site | |
| PA | 483 (53.14) |
| WV | 426 (46.86) |
| Annual household income | |
| < $50,000 | 375 (43.60) |
| ≥ $50,000 | 485 (56.40) |
| Home water source | |
| Water company | 766 (93.87) |
| Well | 50 (6.13) |
| Home fluoride level (ppm) | 0.79 ± 0.29 |
| Mother’s educational attainment | |
| < High school | 171 (18.98) |
| High school-Some college | 260 (28.86) |
| College degree or more | 470 (52.16) |
| Mother’s tooth brushing frequency | |
| > 2/day | 661 (73.36) |
| 1/day | 216 (23.97) |
| < 1/day | 24 (2.66) |
| Breastfeeding status at baseline | |
| Yes | 733 (83.58) |
| No | 144 (16.42) |
| Breastfeeding duration (months) | 3.66 ± 5.48 |
Note: PA: Pennsylvania; WV: West Virginia; SD: standard deviation.