Table 2.

Clinical features of animals stratified based upon presentation of periodontal health and disease.

Clinical Measure	Healthy				Periodontitis
	Young	Adolescent	Adult	Aged	Adult	Aged
Animal Group
Mean BOP	0.3 ± 0.2*	1.0 ± 0.6a	1.0 ± 0.3b	1.0 ± 0.5a	2.2 ± 0.2c	2.3 ± 0.3c
Mean PPD	1.4 ± 0.1	2.3 ± 0.3b	2.5 ± 0.4b	2.5 ± 0.4b	3.4 ± 0.2c	3.5 ± 0.4c
Site Sampled
Mean BOP	0.3 ± 0.4	0.9 ± 0.5	0.8 ± 0.4	0.9 ± 0.6	2.4 ± 0.4c	2.7 ± 0.4c
Mean PPD	1.3 ± 0.2	2.0 ± 0.3a	2.3 ± 0.3b	2.3 ± 0.7a	3.6 ± 0.3c	4.7 ± 0.9c,d

^*Values denote group means ± 1SD

^aSignificantly different from young group at least at p<0.05

^bSignificantly different from young group at least at p<0.001

^cSignificantly different from matched age healthy at least at p<0.001

^dSignificantly different from adult periodontitis at p<0.03