Table 1.

Mean clinical parameters (± SD) of subject groups at baseline.

	Healthy	Periodontitis	p (Mann Whitney)
N subjects	38	17
Age	32.32 ± 9.34	44.88 ± 11.94	p < 0.001
Number of missing teeth	0.87 ± 1.55	2.18 ± 2.40	p < 0.05
% males	39	35	NS
% past smokers	29	29	NS
Pocket depth (mm)	1.94 ± 0.30	2.70 ± 0.29	p < 0.001
Attachment level (mm)	1.50 ±0.63	2.98 ± 1.17	p < 0.001
Plaque Index	1.22 ±0.74	1.58 ± 0.73	NS
% of sites with:
Gingival Redness	47.69 ± 30.71	62.63 ± 34.75	p < 0.001
BOP	7.33 ± 6.85	27.18 ± 12.79	p < 0.001
Suppuration	0.00 ± 0.00	0.16 ± 0.38	p < 0.01
N White	28	10
N African American	1	4
N Asian	6	2
N Other	3	1

3 White and 2 Other subjects in the Healthy group were Hispanic, while 2 White subjects in the Periodontitis group were Hispanic