Table 1. Baseline demographic characteristics (n=45).

Characteristics	Group 1 (SRP+placebo)	Group 2 (SRP+P)	Group 3 (SRP+PPP)	P value
Age	42.87±3.42	41.79±2.37	39.74±2.97	0.161 (NS)
Males/females	7/8	6/9	8/7	0.858 (NS)

Values are presented as mean±standard deviation. Significance of differences between groups: P>0.05: NS.

SRP: scaling and root planing, SRP+P: scaling and root planing+single application of probiotic, SRP+PPP: scaling and root planing+incremental application of probiotic, NS: not significant.