Table 1 Distribution of selected characteristics in 6315 children aged 3 years
Variable | n (%) or mean ± SD |
|---|---|
Male sex | 3210 (50.8) |
Age, months, mean ± SD | 38.7 ± 2.6 |
Region of residence | |
Fukuoka City | 2529 (40.1) |
Municipalities on Kyushu other than Fukuoka City | 3021 (47.8) |
Municipalities in Okinawa Prefecture | 765 (12.1) |
Breastfeeding duration (months) | |
< 12 | 1920 (30.4) |
≥ 12 | 4395 (69.6) |
Between-meal snack frequency (times/day) | |
< 1 | 1357 (21.5) |
1 | 2077 (32.9) |
≥ 2 | 2881 (45.6) |
Toothbrushing frequency (times/day) | |
< 1 | 752 (11.9) |
1 | 2670 (42.3) |
≥ 2 | 2893 (45.8) |
Use of fluoride | |
No | 498 (7.9) |
Yes | 5817 (92.1) |
Regular dental check-ups | |
No | 2759 (43.7) |
Yes | 3556 (56.3) |
Maternal smoking during pregnancy | |
No | 5721 (90.6) |
Yes | 594 (9.4) |
Living with at least one household smoker | |
Never | 3675 (58.2) |
Ever | 2640 (41.8) |