Table 2.

Comparison of DDQ between children with intellectual disability and normal children.

Question	Frequency	Disabled children		Normal children		Chi-square	P value
		n	%	n	%
Problems with brushing upper teeth	Never	29	26.1	110	88	94.25	0.000*
	Occasionally	79	71.2	13	10.4
	Always	3	2.7	2	1.6
Problems with brushing lower teeth	Never	39	35.1	115	92	84.4	0.000*
	Occasionally	70	63.1	9	7.2
	Always	2	1.8	1	0.8
Puts away something nice to eat	Never	106	95.5	109	87.2	5.49	0.06†
	Occasionally	5	4.5	14	11.2
	Always	0	0	2	1.6
Bites with molar instead of front teeth	Never	100	90.1	95	76	9.27	0.010*
	Occasionally	10	9	22	17.6
	Always	1	0.9	8	6.4
Chewing at one side	Never	96	86.5	105	84	1.511	0.47†
	Occasionally	14	12.6	16	12.8
	Always	1	0.9	4	3.2
Problems in chewing	Never	95	85.6	115	92	7.62	0.022*
	Occasionally	16	14.4	7	5.6
	Always	0	0	3	2.4
Reaching for cheek while eating	Never	100	90.1	115	92	7.49	0.02*
	Occasionally	11	9.9	5	4
	Always	0	0	5	4
Crying at night	Never	109	98.2	119	95.2	2.28	0.31†
	Occasionally	2	1.8	4	3.2
	Always	0	0	2	1.6
Crying during meals	Never	102	91.9	121	96.8	2.72	0.09†
	Occasionally	9	8.1	4	3.2
	Always	0	0	0	0
Earache at night	Never	109	98.2	111	88.8	8.55	0.014*
	Occasionally	2	1.8	10	8
	Always	0	0	4	3.2
Earache at daytime	Never	110	99.1	114	91.2	7.76	0.02*
	Occasionally	1	0.9	7	5.6
	Always	0	0	4	3.2
Earache during eating	Never	111	100	115	92	9.27	0.01*
	Occasionally	0	0	8	6.4
	Always	0	0	2	1.6
Excessive salivation	Never	15	13.5	95	76	95.3	0.000*
	Occasionally	73	65.8	17	13.6
	Always	23	20.7	13	10.4
Putting hand inside the mouth	Never	45	40.5	116	92.8	74.24	0.000*
	Occasionally	63	56.8	9	7.2
	Always	3	2.7	0	0
Do you think your child has dental pain	Never	101	91	107	85.6
	Always	9	8.1	18	14.4	3.35	0.18†
	Occasionally	1	0.9	0	0
How frequent is your child's dental pain	Never	101	91	110	88	0.55	0.45†
	Occasionally	10	9	15	12
	Always	0	0	0	0
How severe is your child's dental pain	Never	102	91.9	66	52.8	45.21	0.000*
	Mild	6	5.4	50	40
	Moderate	3	2.7	7	5.6
	Severe	0	0	2	1.6
When does pain occur	Never	102	91.9	66	52.8	45.33	0.000*
	Mild	5	4.5	48	38.4
	Moderate	3	2.7	7	5.6
	Severe	1	0.9	4	3.2

^*Statistically significant (P < 0.05).

^†Statistically not Significant (P > 0.05).