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. 2019 Sep-Oct;12(5):375–378. doi: 10.5005/jp-journals-10005-1675

Table 3.

Comparison of reduction in OHIS among both the groups

OHI-S Ionic toothbrush Normal toothbrush Mean difference t test value p value
Mean Std. deviation Mean Std. deviation
Baseline (1) 2.65 0.83 2.88 0.77 −0.23 −0.908   0.369
At 15 days (2) 1.43 0.29 1.95 0.54 −0.51 −3.761   0.001
At 30 days (3) 0.89 0.31 1.53 0.48 −0.64 −5.011 <0.001
p value <0.001 <0.001
Post hoc Bonferroni test 3 > 2 > 1 3 > 2 > 1