Table 3.

The means of caries indices (DT, MT, FT and DMFT) according to gender, nationality, monthly income and level of education

Variables	n	DT	MT	FT	DMFT
Gender
Male	875	3.4	3.3	3.4	10.1
Female	419	2.2	3.6	5.2	11.0
Statistical significance (p < 0.05)		<0.001	0.147	<0.001	0.021
Nationality
Kuwaiti	846	2.8	3.6	4.8	11.1
Non-Kuwaiti	448	3.4	3.0	2.5	8.9
Statistical significance (p < 0.05)		0.001	0.003	<0.001	<0.001
Monthly income
Less than 300 KWD	194	3.5	2.3	1.3	7.2
300-700 KWD	334	3.4	3.5	3.4	10.3
710-1200 KWD	494	2.6	3.6	4.8	11.0
>1200 KWD	272	2.8	3.7	5.2	11.7
Statistical significance (p < 0.05)		<0.001	<0.001	<0.001	<0.001
Level of education
Intermediate school or less	105	4.2	3.6	2.8	10.6
High school	293	3.3	3.5	3.3	10.1
Diploma	55	3.0	3.5	4.8	11.3
University and above	841	2.7	3.3	4.3	10.4
Statistical significance (p < 0.05)		<0.001	0.826	<0.001	0.671