Table 4a. Average Gingival Index (total and interproximal) and average Gingival Bleeding Index by age and city.
| Gingival Index | Interproximal Gingival Index | Gingival Bleeding Index | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age (years) | Mean | IC 95% | p-value * | p-value ** | p-value *** | mean | IC 95% | p-value * | p-value ** | p-value *** | mean | IC 95% | p-value * | p-value ** | p-value *** | |
| PORTO ALEGRE | 18–19 | 1.00 | 0.89,1.11 | 0.005 | 1.06 | 0.95,1.16 | 0.010 | 18.5 | 1.0,56.0 | 0.344 | ||||||
| 20–29 | 1.07 | 1.01,1.13 | 1.12 | 1.07,1.18 | 21.1 | 0.0,72.0 | ||||||||||
| 30–39 | 1.07 | 1.02,1.13 | 1.13 | 1.07,1.18 | 20.6 | 1.0,78.0 | ||||||||||
| 40–49 | 1.11 | 1.05,1.18 | 1.16 | 1.10,1.22 | 22.3 | 1.0,94.0 | ||||||||||
| ≥50 | 1.19 | 1.14,1.25 | 1.23 | 1.18,1.28 | 25.9 | 0.0,100 | ||||||||||
| TUCUMÁN | 18–19 | 1.15 | 1.00,1.29 | 0.188 | 0.683 | 1.12 | 0.97,1.27 | 0.229 | 2.263 | 23.6 | 15.9,31.3 | 0.285 | 1.358 | |||
| 20–29 | 1.07 | 1.01,1.13 | 2.535 | 1.05 | 1.00,1.11 | 0.078 | 21.0 | 18.0,24.1 | 2.333 | |||||||
| 30–39 | 1.10 | 1.04,1.16 | 1.175 | 1.07 | 1.01,1.13 | 0.556 | 21.9 | 18.8,25.0 | 1.415 | |||||||
| 40–49 | 1.08 | 1.01,1.16 | 1.043 | 1.06 | 0.99,1.14 | 0.042 | 21.6 | 17.0,26.2 | 0.422 | |||||||
| ≥50 | 1.17 | 1.11,1.23 | 2.167 | 1.15 | 1.08,1.21 | 0.093 | 26.4 | 22.7,30.1 | 2.969 | |||||||
| SANTIAGO | 18–19 | 1.51 | 1.34,1.67 | 0.000 | 0.000 | 0.005 | 1.55 | 1.39,1.70 | 0.000 | 0.000 | 0.000 | 57.1 | 44.8,69.4 | 0.000 | 0.000 | 0.000 |
| 20–29 | 1.66 | 1.61,1.70 | 0.000 | 0.000 | 1.68 | 1.64,1.73 | 0.000 | 0.000 | 67.1 | 63.0,71.2 | 0.000 | 0.000 | ||||
| 30–39 | 1.72 | 1.66,1.79 | 0.000 | 0.000 | 1.76 | 1.70,1.82 | 0.000 | 0.000 | 74.2 | 69.3,79.1 | 0.000 | 0.000 | ||||
| 40–49 | 1.77 | 1.71,1.82 | 0.000 | 0.000 | 1.8 | 1.75,1.86 | 0.000 | 0.000 | 77.7 | 73.3,82.2 | 0.000 | 0.000 | ||||
| ≥50 | 1.78 | 1.74,1.81 | 0.000 | 0.000 | 1.8 | 1.77,1.84 | 0.000 | 0.000 | 78.8 | 75.8,81.7 | 0.000 | 0.000 | ||||
| TOTAL | 18–19 | 1.21 | 1.12,1.31 | 0.000 | 1.23 | 1.14,1.32 | 0.000 | 32.5 | 26.2,38.7 | 0.002 | ||||||
| 20–29 | 1.28 | 1.24,1.33 | 1.3 | 1.26,1.34 | 37.7 | 34.6,40.8 | ||||||||||
| 30–39 | 1.28 | 1.23,1.33 | 1.3 | 1.25,1.35 | 37.4 | 34.0,40.8 | ||||||||||
| 40–49 | 1.33 | 1.28,1.39 | 1.36 | 1.30,1.41 | 41.6 | 37.7,45.5 | ||||||||||
| >50 | 1.40 | 1.36,1.44 | 1.42 | 1.38,1.45 | 45.2 | 42.4,48.0 | ||||||||||
Kruskal-Wallis adjusted p-value for significance, to assess differences between ages versus each Index by city and total (p-value*), differences between Porto Alegre versus Tucumán or Santiago in each Index (p-value**).
differences between Tucumán versus Santiago in each Index (p-value***)