Table 3.

Association between self-reported toothbrushing frequency and clinical indexes for oral hygiene

Variables	Toothbrushing frequency				p value*
	≤ twice a day		More than twice a day
	n	(%)	n	(%)
Visible Plaque Index
Present	277	(76.9)	83	(23.1)	<0.001
Absent	63	(27.5)	166	(72.5)
Simplified Oral Hygiene Index
Unsatisfactory	224	(79.7)	57	(20.3)	<0.001
Satisfactory	116	(37.7)	192	(63.3)

*Chi-square test. Results significant at the 5% level marked in bold.