Table. 1.

Table 1 Clinical characteristics of participants in the study cohort

Characteristics	Periodontitis group (N=13)	Periodontitis-free control group (N=19)
Sex (female/male), N	7/6	9/10
Age, yrs, mean±SD	64.3±8.2	30.9±4.4
Smoking habit, N of cases
Non-smoker/ex-smoker/current smoker	12/1/0	17/2/0
N of missing teeth, mean±SD	16.5±8.2	0
N of periodontal pockets >4 mm, mean±SD	4.8±2.4	0
N of periodontal pockets >6 mm, mean±SD	3.1±1.6	0
Periodontitis classification, N
Stage I/II/III/IV	0/0/0/13	0/0/0/0
Underlying disease, N (%)
Any cancer or tumor type	3 (23.1)	0 (0.0)
Hypertension	3 (23.1)	0 (0.0)
Any cardiovascular disease	2 (15.4)	0 (0.0)
Diabetes mellitus	1 (7.7)	0 (0.0)