Table 1: Demographic and clinical data in patients with chronic periodontitis (CP) and nonperiodontitis controls.

Patients with CPControls

Number of subjects4715
Mean age (yrs ± SD)
Age range (yrs) From 35 to 65From 35 to 66
Sex (M/F)21/264/11
PD (mm; mean ± SD)
CAL (mm; mean ± SD)

.