Table 1 Distribution of characteristics of 1162 women, KOMCHS, Japan
Variable | Number (%) or mean ± SD |
|---|---|
Age (years) | 31.5 ± 4.2 |
Region of residence | |
Fukuoka Prefecture | 734 (63.2) |
Other than Fukuoka Prefecture in Kyushu | 321 (27.6) |
Okinawa Prefecture | 107 (9.2) |
Smoking status | |
Never | 818 (70.4) |
Ever | 344 (29.6) |
Toothbrushing frequency (times/day) | |
< 2 | 149 (12.8) |
2 | 586 (50.4) |
≥ 3 | 427 (36.8) |
Use of an interdental brush | |
No | 627 (54.0) |
Yes | 535 (46.0) |
Household income (yen/year) | |
< 4,000,000 | 374 (32.2) |
4,000,000–5,999,999 | 418 (36.0) |
≥ 6,000,000 | 370 (31.8) |
Educational level (years) | |
< 13 | 239 (20.6) |
13–14 | 386 (33.2) |
≥ 15 | 537 (46.2) |
Total energy intake (kJ/day) | 7396.0 ± 1955.5 |
Calcium intake (mg/day)* | 500.2 ± 220.9 |