Table 3.

Percentage change in responses to knowledge and behavior on oral health among the school children in both groups before and after intervention

Knowledge and behavior questions on oral health	%Difference between before and after intervention		Net effect of intervention (% change)
	Intervention	Control
Knowledge questions
The main cause of tooth decay	+ 56.37	+ 6.36	+ 50.01
The main cause of gum diseases	+ 28.19	− 20.91	+ 49.1
Prevention of dental caries and periodontal diseases	+ 20	+ 2.73	+ 17.27
Foods that can cause dental caries	+ 10	− 0.9	+ 10.9
Development of oral cancer	+ 20	− 1.81	+ 21.81
Behavior questions
Frequency of tooth brushing	+ 31.82	− 10.91	+ 42.73
Occasion of tooth brushing	+ 44.55	− 3.63	+ 48.18
Devices using in tooth brushing	+ 6.36	− 7.28	+ 13.64
Device used to remove food debris stuck between the teeth	+ 39.09	− 0.91	+ 40.00
Pattern of tooth brushing (by direct observation)	+ 81.81	+ 2.72	+ 79.09