Table 2.

clinical periodontal parameters in chronic periodontitis and control subjects

	Chronic periodontitis	Control
PD (mean ± SD)	4.4±1.0	3.0±0.4a
Clinical attachment loss (mean ± SD)	3.1±1.4	0.36±0.4b
Percentage of PD ≥5 mm	18% (3–55)	1%
Percentage of CAL ≥3 mm	30% (3–100)	0.8%d
PI	2	1.9
GI	2.4	2.5

Notes:

^aMean PD in the periodontitis vs control groups: P=0.0001.

^bMean attachment level in the periodontitis vs control groups: P=0.001.

^cPercentage of sites with PD ≥5 mm in the periodontitis vs control groups: P=0.001.

^dPercentage of sites with CAL ≥3 in the periodontitis vs control groups: P=0.0001.

Abbreviations: CAL, clinical attachment level; GI, gingival index; PD, probing depth; PI, plaque index.