From: Prevalence of gingivitis and calculus in 12-year-old Puerto Ricans: a cross-sectional study
 |  |  |  |  | Total Calculus | Supragingival Calculus | Subgingival Calculusc | |||
---|---|---|---|---|---|---|---|---|---|---|
Region | N | % N | Wtb N | Wt N% | % | 95% CI | % | 95% CI | % | 95% CI |
North | 165 | 10.40 | 297 | 18.73 | 45.42 | (32.59–58.25) | 36.09 | (25.43–46.75) | 18.36 | (7.97–28.75) |
East | 129 | 8.13 | 69 | 4.35 | 61.56 | (45.78–77.33) | 55.82 | (41.76–69.87) | 15.02 | (5.02–25.03) |
Metropolitan | 363 | 22.89 | 581 | 36.63 | 69.41 | (60.31–78.51) | 66.96 | (58.08–75.84) | 20.30 | (11.85–28.73) |
San Juan | 163 | 10.28 | 164 | 10.34 | 75.79 | (62.80–88.78) | 73.84 | (61.33–86.34) | 27.04 | (15.34–38.74) |
Central | 222 | 14.00 | 243 | 15.32 | 53.78 | (44.31–63.25) | 49.45 | (41.01–57.89) | 15.84 | (10.79–20.89) |
Southeast | 143 | 9.02 | 67 | 4.22 | 64.67 | (54.73–74.61) | 60.79 | (49.82–71.76) | 16.15 | (9.63–22.68) |
Ponce | 68 | 4.29 | 29 | 1.83 | 43.04 | (31.73–54.35) | 41.31 | (31.28–51.33) | 8.29 | (0.00–17.06) |
Southwest | 82 | 5.17 | 13 | 0.82 | 74.39 | (64.70–84.08) | 63.05 | (53.04–73.06) | 27.18 | (16.17–38.19) |
West | 78 | 4.92 | 47 | 2.96 | 64.35 | (49.19–79.50) | 57.96 | (42.81–73.10) | 25.50 | (11.41–39.60) |
Northwest | 77 | 4.85 | 46 | 2.90 | 51.55 | (26.80–76.30) | 42.93 | (14.37–71.49) | 24.87 | (10.65–39.08) |
Northeast | 96 | 6.05 | 30 | 1.89 | 72.40 | (59.79–85.01) | 71.43 | (59.59–83.29) | 26.22 | (15.01–37.43) |
Total PR | 1,586 | 100 | 1,586 | 100 | 61.59 | (56.61–66.57) | 57.09 | (52.03–62.15) | 19.78 | (16.01–23.55) |