Table 2.

Correct knowledge and proper behavior on oral health between the two groups

Variables	Categories	Intervention	Control	p value
		n (%)	n (%)
Knowledge questions
The main cause of tooth decay	At baseline	17(15.5)	13(11.8)	0.432
	After 1 year	79(71.8)	20(18.2)	< 0.001
The main cause of gum diseases	At baseline	29(26.4)	64(58.2)	< 0.001
	After 1 year	60(54.5)	41(37.3)	0.010
Prevention of dental caries and periodontal diseases	At baseline	78(70.9)	85(77.3)	0.281
	After 1 year	100(90.9)	88(80.0)	0.022
Foods that can cause dental caries	At baseline	71(64.5)	72(65.5)	0.888
	After 1 year	82(74.5)	71(64.5)	0.107
Development of oral cancer	At baseline	74(67.3)	84(76.4)	0.134
	After 1 year	96(87.3)	82(74.5)	0.016
Behavior questions
Frequency of tooth brushing	At baseline	39(35.5)	25(22.7)	0.038
	After 1 year	74(67.3)	7(6.4)	< 0.001
Occasion of tooth brushing	At baseline	21(19.1)	8(7.3)	0.010
	After 1 year	70(63.6)	4(3.6)	< 0.001
Devices using in tooth brushing	At baseline	99(90.0)	92(83.6)	0.163
	After 1 year	106(96.4)	84(76.4)	< 0.001
Device used to remove food debris stuck between the teeth	At baseline	8(7.3)	5(4.5)	0.391
	After 1 year	51(46.4)	4(3.6)	< 0.001
Pattern of tooth brushing (by direct observation)	At baseline	5(4.5)	3(2.7)	0.721
	After 1 year	95(86.4)	6(5.5)	< 0.001