Table 1.

Clinical characteristic of study groups

	Smokers	Ex- Smokers	Never Smokers	p value
Subjects, n	26	20	25
Age (yr)	30.5 (26–38.25)	35.5 (25–38.5)	34 (29.5–37)	0.313
Female	8/26 (30.8%)	8/20 (40%)	11/25 (44%)	0.610
Frequency toothbrushing (daily)	2 (1.6–3)	2.5 (2–3)	2 (2–3)	0.260
Frequency mouthwashing (per week)	0 (0–0)	0 (0–1)	1 (0–2)	0.002
Frequency dental floss usage (per week)	0 (0–1.4)	1 (0–1.5)	1 (0–1.5)	0.760
No. Cig./Day	15 (12–19.5)	//	//	NA
Year smoking	11 (8.5–19.75)	//	//	NA
Pack/years	9.75 (5.6–12.5)	//	//	NA
Year non-smoking	//	2.5 (1.5–7.65)	//	NA

Data are presented as median (IQR), n/N (%) unless otherwise stated

NA Not applicable