Periodontal Status in Smokers and Nonsmokers: A Clinical, Microbiological, and Histopathological Study

Table 15

Pattern of clinical parameters with years of smoking.

Clinical parameters	Years of smoking				P value
	<1 years	1–5 years	5–15 years	>15 years
PD <4 mm%	99.38; (84.2–100.0)	97.78; (0–100)	96.06; (17.31–100.0)	87.21; (63.33–100)	<0.001**
PD 4–7 mm%	0.62; (0–14.58)	1.66; (0–33.33)	3.81; (0–76.92)	12.9; (0–32.67)	<0.001**
PD > 7 mm%	0; (0–0.52)	0; (0–12.00)	0; (0–6.17)	0.07; (0–4)	0.724
CAL <4 mm%	4.16; (0–12.50)	5.67; (0–37.10)	6.96; (0–36.56)	15.61; (0.64–26.11)	0.005**
CAL 4–7 mm%	2.94; (0–14.06)	3.87; (0–71.88)	10.98; (0–42.98)	38.06; (2.78–83.97)	<0.001**
CAL >7 mm%	0; (0–0)	0; (0–24)	0.23; (0–54.49)	2.25; (0–20.0)	<0.001**