. 2013 Nov;23(3):255–264. doi: 10.4314/ejhs.v23i3.8

Table 1.

Comparison of new brush group (NBG) and old brush group (OBG) with respect to total plaque scores and %Brushing Surface Areas Increase at all-time points.

Time point	Group	Plaque			% Toothbrush Surface Area Increase

				Median	Inter-quartile range (xU-xL)	P-value	Median	Inter-quartile range (xU-xL)	p-value
40^th Day	New brush group	1.25	0.33	0.7774	4.32	4.22	0.9399
40^th Day	Old brush group	1.18	0.25	0.7774	3.81	4.47	0.9399
70^th Day	New brush group	1.12	0.29	0.0008^*	4.48	4.06	0.0288^*
70^th Day	Old brush group	1.42	0.24	0.0008^*	8.30	8.56	0.0288^*
100^th Day	New brush group	1.26	0.23	0.0002^*	3.75	4.51	0.0003^*
100^th Day	Old brush group	1.81	0.41	0.0002^*	12.80	9.16	0.0003^*

Baseline to 100^th day		p =0.0001^*			p =0.0007^*

Calculated by Mann-Whitney u test p-value significant at p ≤0.05