Table 1.
The prevalence of gingivitis and mean numbers of teeth with gingival bleeding among 12–15 years old children. (weighted)
| Variable | Category | N | Gingivitis† | Localized gingivitis‡ | Generalized gingivitis* | Gingival bleeding teeth | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | % | 95% CI | n | % | 95% CI | n | % | 95% CI | SD | ||||
| Age (year) | 12 | 1920 | 523 | 27.2 | (25.2, 29.2) | 419 | 21.8 | (20.0, 23.7) | 104 | 5.4 | (4.4, 6.4) | 1.96 | 3.22 |
| 13 | 1920 | 538 | 28.0 | (26.0, 30.0) | 416 | 21.7 | (19.8, 23.5) | 122 | 6.4 | (5.3, 7.4) | 2.09 | 3.45 | |
| 14 | 1920 | 633 | 33.0 | (30.9, 35.0) | 479 | 24.9 | (23.0, 26.9) | 154 | 8.0 | (6.8, 9.2) | 2.59 | 4.07 | |
| 15 | 1920 | 582 | 30.3 | (28.3, 32.4) | 424 | 22.1 | (20.2, 23.9) | 158 | 8.2 | (7.0, 9.5) | 2.40 | 4.20 | |
| Gender | Male | 3840 | 1176 | 30.6 | (29.2, 32.1) | 887 | 23.1 | (21.8, 24.4) | 289 | 7.5 | (6.7, 8.4) | 2.33 | 3.84 |
| Female | 3840 | 1100 | 28.6 | (27.2, 30.1) | 851 | 22.1 | (20.8, 23.5) | 249 | 6.5 | (5.7, 7.3) | 2.17 | 3.67 | |
| Area | Urban | 3840 | 1158 | 30.2 | (28.7, 31.6) | 864 | 22.5 | (21.2, 23.8) | 294 | 7.7 | (6.8 8.5) | 2.31 | 3.84 |
| Rural | 3840 | 1118 | 29.1 | (27.7, 30.6) | 874 | 22.8 | (21.4, 24.1) | 243 | 6.3 | (5.6, 7.1) | 2.21 | 3.69 | |
| Father’s Education level | ≤ 9 years | 4346 | 1309 | 30.1 | (28.8, 31.5) | 1005 | 23.1 | (21.9, 24.4) | 304 | 7.0 | (6.2, 7.8) | 2.30 | 3.81 |
| 10 –12 years | 1474 | 423 | 28.7 | (26.4, 31.0) | 310 | 21.0 | (19.0, 23.1) | 113 | 7.7 | (6.3, 9.0) | 2.27 | 3.93 | |
| ≥ 13 years | 804 | 230 | 28.6 | (25.5, 31.7) | 174 | 21.6 | (18.8, 24.5) | 56 | 7.0 | (5.2, 8.7) | 2.11 | 3.53 | |
| Unclear | 1057 | 314 | 29.7 | (27.0, 32.5) | 249 | 23.6 | (21.0, 26.1) | 65 | 6.1 | (4.7, 7.6) | 2.19 | 3.52 | |
| Mother’s Education level | ≤ 9 years | 4871 | 1467 | 30.1 | (28.8, 31.4) | 1120 | 23.0 | (21.8, 24.2) | 346 | 7.1 | (6.4, 7.8) | 2.30 | 3.79 |
| 10–12 years | 1074 | 313 | 29.1 | (26.4, 31.9) | 230 | 21.4 | (19.0, 23.9) | 83 | 7.7 | (6.1, 9.3) | 2.26 | 3.88 | |
| ≥ 13 years | 678 | 185 | 27.3 | (23.9, 30.6) | 146 | 21.5 | (18.4, 24.6) | 39 | 5.8 | (4.0, 7.5) | 1.98 | 3.46 | |
| Unclear | 1045 | 311 | 29.8 | (27.0, 32.5) | 242 | 23.2 | (20.6, 25.7) | 70 | 6.7 | (5.2, 8.2) | 2.27 | 3.72 | |
| Total | 7680 | 2276 | 29.6 | (28.6, 30.7) | 1738 | 22.6 | (21.7, 23.6) | 538 | 7.0 | (6.4, 7.6) | 2.26 | 3.77 | |
†Prevalence of gingivitis (calculated as a proportion of gingival bleeding score ≥ 10%)
‖: The results of the chi-square test
‡: Prevalence of localized gingivitis (calculated as a proportion of gingival bleeding score ≥ 10% and ≤ 30%)
*: Prevalence of generalized gingivitis (calculated as a proportion of gingival bleeding score > 30%)
¶: The results of the Kruskal–Wallis H test