Table 2.

Multiple pairwise comparisons of the clinical parameters between the study groups

Parameter	Reference Group	Comparison Group	Mean difference	P
% of bleeding sites	Current user	Former user	4.07	0.001*
		Nonuser	9.29	0.001*
	Former user	Nonuser	5.22	0.001*
Mean number of sites with periodontal pockets	Current user	Former user	1.42	0.001*
		Nonuser	3.26	0.001*
	Former user	Nonuser	1.84	0.001*
Number of sites with attachment loss ≥5 mm	Current user	Former user	2.92	0.001*
		Nonuser	4.84	0.001*
	Former user	Nonuser	1.92	0.001*
Number of teeth lost	Current user	Former user	2.01	0.001*
		Nonuser	2.4	0.001*
	Former user	Nonuser	0.39	0.4

Tukey’s post hoc tests; P≤0.01 considered statistically significant; *denotes statistical significance