Table 4.

Mean (±standard deviation) percentage of plaque and gingival bleeding outcome measures at baseline and 12 weeks

Variable	Time point	Treatment group		p-value
		SRP Mean ± SD	SRP + P Mean  ± SD	For mean
% Sites with supragingival plaque
Overall	Baseline	99.66 ± 0.99	95 ± 10.27	NS
	3 weeks	25.25 ± 31.27*	8.94 ± 12.20*	0.089
	6 weeks	26.18 ± 31.42*	10.91 ± 16.59*	0.029
	9 weeks	25.77 ± 31.33*	11.13 ± 13.28*	NS
	12 weeks	24.88 ± 33.26*	16.34 ± 19.19*	NS
% Sites with gingival bleeding
Overall	Baseline	99.57 ± 1.16	97.77 ± 4.38	NS
	3 weeks	32.9 ± 30.2*	13.54 ± 16.59*	0.074
	6 weeks	33.45 ± 30.01*	16.37 ± 19.91*	0.089
	9 weeks	30.89 ± 29.54*	14.06 ± 16.51*	NS
	12 weeks	29.01 ± 32.36*	4.3 ± 10.69*	<0.001

Significance of differences between groups: p > 0.1: not significant (NS); p < 0.1 to >0.05: tendency; p < 0.05: significant (bold).

^*Significantly different from baseline.

SRP, scaling and rootplaning + placebo lozenge; SRP + P, scaling and rootplaning + probiotic lozenge.