From: Prevalence of gingivitis and calculus in 12-year-old Puerto Ricans: a cross-sectional study
 |  |  | Gingivitis | Limited Gingivitis | Extensive Gingivitis | BOP% Sites | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Strata | N | Wt N | % | 95% CI | p-value1a | % | 95% CI | p-value2b | % | 95% CI | p-value2 | Mean | SE | 95% CI | p-value3c |
Gender | |||||||||||||||
 Female | 841 | 814 | 79.57 | (74.16–84.98) | 0.54 | 18.75 | (14.30–23.20) | 0.48 | 60.82 | (54.43–67.21) | 0.64 | 17.69 | 0.932 | (15.85–19.54) | 0.83 |
 Male | 745 | 773 | 81.29 | (77.40–85.17) | 20.48 | (16.58–24.39) | 60.80 | (55.21–66.39) | 17.90 | 0.852 | (16.21–19.58) | ||||
School type | |||||||||||||||
 Rural-public | 597 | 612 | 77.59 | (70.92–84.26) | 0.15 | 21.66 | (17.36–25.97) | 0.67 | 55.92 | (47.81–64.03) | 0.09 | 16.82 | 1.168 | (14.47–19.17) | <0.0005 |
 Urban-public | 628 | 722 | 83.24 | (78.07–88.40) | 0.16 | 16.36 | (12.09–20.62) | 0.96 | 66.88 | (60.40–73.36) | 0.07 | 19.44 | 1.191 | (17.05–21.83) | <0.002 |
 Private | 361 | 253 | 79.15 | (69.64–88.66) | – | 23.82 | (17.08–30.56) | – | 55.33 | (44.75–65.91) | – | 15.44 | 1.223 | (12.94–17.94) | – |