Table 1.

Clinical and Demographic Characteristics of Participants (mean ± standard deviation)

	Current Smokers (N = 15)	Never-smokers (N = 15)	p-value
Mean age (yrs)	52.3 ± 2.1	50.2 ± 3.3	0.53
Gender (male)	11	11
Tobacco exposure (mean pack-yrs ± SD)	18.3 ± 2.7	0	0.007
Clinical parameters at sampled sites
Mean plaque index (± SD)	2.3 ± 0.6	2.6 ± 0.4	0.32
Mean bleeding on probing (% ± SD)	37.0 ± 2.8	52.8 ± 1.2	0.043
Mean clinical attachment levels (mm ± SD)	7.0 ± 0.6	6.8 ± 0.8	0.56
Mean probing depths (mm ± SD)	6.7 ± 0.3	7.1 ± 0.5	0.72

Significant differences in tobacco exposure and bleeding on probing were seen between the two groups (two-sample t test) (AYS, HNN, PSK).