TABLE 1.

Periodontal criteriaa

Subject groupMean ± SEb
Bone loss (mm)Attachment loss (mm)Bleeding on probing
PD CVD1.88 ± 0.151.61 ± 0.080.364 ± 0.053
PD+ CVD6.01 ± 0.43∗5.40 ± 0.23∗∗0.502 ± 0.071∗∗∗
PD CVD+2.36 ± 0.211.72 ± 0.040.308 ± 0.048
PD+ CVD+5.55 ± 0.33∗4.85 ± 0.22∗∗0.485 ± 0.072∗∗∗
  • a The periodontal criteria were determined as follows. CVD+, the medical history revealed past or present history of one or more of the following: angina, myocardial infarction, and/or stroke. Periodontal status was defined by attachment loss as follows: <2 mm, no PD (PD); ≥4 mm, PD (PD+). Statistical analyses included analysis of variance (ANOVA) of mean values ± the SE for patients in each group and ANOVA to test the factors and interaction. The P values for the latter were derived by using the nonparametric Kruskal-Wallis test.

  • b ∗, the ANOVA results for bone loss show a highly significant PD effect (P < 0.0001), with no CVD effect (P = 0.97) and a nonsignificant interaction term (P = 0.134). ∗∗, the ANOVA results for attachment loss show a highly significant PD effect (P < 0.0001) and a trend indicating interaction (P = 0.053). ∗∗∗, in comparing bleeding-on-probing data among the groups, there is a significant difference by PD (P = 0.025); there is no difference by CVD or interaction of CVD with PD.