Table 1.

Comparison of clinical parameters between the three study groups

Parameter	Group	n	Mean±SD	Between group sum of squares	Mean square	F	P
% of bleeding sites	Current user	100	25.1±5.34	4337.247	2168.62	72.685	0.001*
	Former user	100	21.03±6.46
	Nonuser	100	15.8±4.38
Mean number of sites with periodontal pockets	Current user	100	5.37±3.16	534.32	267.16	35.55	0.001*
	Former user	100	3.95±2.98
	Nonuser	100	2.11±1.89
Number of sites with attachment loss ≥5 mm	Current user	100	7.32±3.43	1187.94	593.97	84.94	0.001*
	Former user	100	4.4±2.49
	Nonuser	100	2.48±1.72
Number of teeth lost	Current user	100	4.8±2.57	331.74	165.87	36.53	0.001*
	Former user	100	2.79±2.02
	Nonuser	100	2.4±1.7

One way ANOVA; P≤0.05 considered statistically significant; *denotes statistical significance