Clinical Parameter Listerine® Group (D28-D0) mean (SD) Water  Group (D28-D0) mean (SD) p-value
VPI -24.1 (9.5) 0.5 (1.7) 0.000
SBI -0.9 (0.5) 0.0 (0.1) 0.000
CI 0.3 (0.5) 0.1 (0.4) 0.379
SI 0.9 (2.03) 0.0 (0.0) 0.110
% BOP -28.7 (8.7) 1.5 (1.8) 0.000
CRP -0.4 (2.7) -0.7 (1.1) 0.743
SD= Standard Deviation, D0=Day 0, D28= Day 28, VPI=Visible Plaque Index, SBI= Sulcus Bleeding Index, CI= Calculus Index, SI= Stain Index, %BOP= Percentage of Sites
with Bleeding on Probing, CRP= Serum Level of C-Reactive Protein
Table 3: Mean values for the difference in clinical parameters between day 0 and day 28.