Table 4.

Results of multiple logistic regression analysis of the relationship between death from heart infarction as a dependent variable and calculus index as independent variable with control for age, gender, dental visits, dental plaque, periodontal pockets, education, income, socioeconomic status, and pack-years of smoking.

Dependent variable	Explaining variable	Beta	Chi-square	P value	OR (95% CI)
Death from heart infarction	Dental calculus	0.834	4.323	0.038	2.30 (1.05–5.06)

Cox and Snell R ², final solution could not be determined; Nagelkerke R ² = 0.049.