Table 2 Odds ratios and 95% confidence intervals for periodontal disease 1162 women, KOMCHS, Japan
Prevalence | Crude OR (95% CI) | P value | Adjusted OR (95% CI)† | P value | |
|---|---|---|---|---|---|
Age (years) | 1.04 (1.00, 1.09) | 0.06 | 1.04 (0.99, 1.09) | 0.09 | |
Region of residence | |||||
Fukuoka Prefecture | 49/734 (6.7%) | 1.00 | 1.00 | ||
Other than Fukuoka Prefecture in Kyushu | 80/321 (24.9%) | 4.64 (3.17, 6.85) | <0.0001 | 4.84 (3.28, 7.24) | <0.0001 |
Okinawa Prefecture | 3/107 (2.8%) | 0.40 (0.10, 1.13) | 0.13 | 0.41 (0.10, 1.14) | 0.14 |
Smoking status | |||||
Never | 88/818 (10.8%) | 1.00 | 1.00 | ||
Ever | 44/344 (12.8%) | 1.22 (0.82, 1.78) | 0.32 | 1.51 (0.99, 2.29) | 0.05 |
Toothbrushing frequency (times/day) | |||||
< 2 | 17/149 (11.4%) | 1.00 | 1.00 | ||
2 | 58/586 (9.9%) | 0.85 (0.49, 1.55) | 0.59 | 0.84 (0.46, 1.57) | 0.56 |
≥ 3 | 57/427 (13.4%) | 1.20 (0.69, 2.19) | 0.54 | 1.05 (0.57, 2.01) | 0.87 |
Use of an interdental brush | |||||
No | 66/627 (10.5%) | 1.00 | 1.00 | ||
Yes | 66/535 (12.3%) | 1.20 (0.83, 1.72) | 0.33 | 1.14 (0.77, 1.69) | 0.51 |
Household income (yen/year) | |||||
< 4,000,000 | 42/374 (11.2%) | 1.00 | 1.00 | ||
4,000,000–5,999,999 | 42/418 (10.1%) | 0.88 (0.56, 1.39) | 0.59 | 0.88 (0.54, 1.43) | 0.61 |
≥ 6,000,000 | 48/370 (13.0%) | 1.18 (0.76, 1.84) | 0.47 | 1.13 (0.69, 1.87) | 0.63 |
Educational level (years) | |||||
< 13 | 24/239 (10.0%) | 1.00 | 1.00 | ||
13–14 | 49/386 (12.7%) | 1.30 (0.78, 2.22) | 0.32 | 1.34 (0.78, 2.38) | 0.30 |
≥ 15 | 59/537 (11.0%) | 1.11 (0.68, 1.86) | 0.69 | 1.17 (0.68, 2.06) | 0.58 |
Calcium intake (mg/day)* | |||||
1st quartile (338.2, -230.7–393.4) | 39/290 (13.4%) | 1.00 | 1.00 | ||
2nd quartile (436.3, 393.5–479.8) | 29/291 (10.0%) | 0.71 (0.42, 1.18) | 0.19 | 0.66 (0.38, 1.13) | 0.13 |
3rd quartile (521.0, 479.9–584.4) | 40/290 (13.8%) | 1.03 (0.64, 1.66) | 0.90 | 0.92 (0.55, 1.52) | 0.73 |
4th quartile (667.7, 584.5–1478.5) | 24/291 (8.2%) | 0.58 (0.33, 0.98) | 0.05 | 0.53 (0.30, 0.94) | 0.03 |
P for trend | 0.11 | 0.07 |