Table 3: Comparison of xerostomia, salivary pH, halitosis over the time between the two groups (n=56).

Variables Time Experimental group (n=28) Control group (n=28) t p Comparison F p
Mean±SD Mean±SD
Xerostomia pretest 2.68±1.22 1.75±2.46 1.79 .079 Group 1.25 0.296
post testI 1.54±1.26 1.86±2.59 -0.59 .558 Time 9.19 <.001
post testII 2.04±1.60 2.46±3.00 -0.67 .507 Group*Time 12.75 <.001
post testIII 2.07±1.56 3.29±3.35 -1.74 .088 - - -
post testIV 1.89±1.50 3.96±3.32 -3.01 .004 - - -
Salivary pH pretest 6.91±0.45 7.14±0.46 -1.82 .074 Group 6.64 0.013
post testI 7.18±0.55 7.19±0.55 1.87 .178 Time 5.35 <0.001
post testII 7.06±0.49 7.00±0.55 5.91 .018 Group*Time 3.19 0.014
post testIII 6.97±0.52 6.91±0.57 3.13 .083 - - -
post testIV 7.05±0.05 6.88±0.46 6.14 .016 - - -
Subjective Halitosis pretest 2.61±1.83 2.11±1.01 1.00 .322 Group 18.31 <0.001
post testI 0.79±1.17 2.29±2.09 -3.32 .002 Time 3.94 <0.001
post testII 0.79±1.13 2.82±2.11 -4.50 <.001 Group*Time 11.54 0.036
post testIII 0.93±1.25 3.00±2.37 -4.09 <.001 - - -
post testIV 1.00±1.49 3.75±2.43 -5.11 <.001 - - -
Objective Halitosis pretest 3.00±0.67 2.89±0.69 0.59 .556 Group 27.12 <.001
post testI 1.68±0.82 2.79±0.69 -5.48 <.001 Time 27.37 <.001
post testII 1.61±0.88 2.64±0.62 -5.11 <.001 Group*Time 21.62 <.001
post testIII 1.71±0.81 2.75±0.65 -5.30 <.001 - - -
post testIV 1.75±0.89 3.18±0.95 -5.83 <.001 - - -

SD: Standard Deviation, post testI: 5minute after the treatment and pretest, post testII: 30minute after the treatment and pretest, post testIII: 60minute after the treatment and pretest, post testIV: 120minute after the treatment and pretest.