Table 2.

Distributions and dental visiting by sex, age, income, tooth brushing, and insurance

	Distributions	Regular dental visits †			Check-up visits			Adjusted effects: regular dental visits			Adjusted effects: check-up visits
	%	%	P value		%	P value		PR (95 % CI)	P value		PR (95 % CI)	P value
Sex
Male	42.3	69.2	0.1579	NS	46.8	0.0462	*	0.98 (0.91, 1.05)	0.5138	NS	0.89 (0.78, 1.01)	0.0688	NS
Female	57.7	73.2			53.1			Ref.			Ref.
Age group
30-39 yrs	24.7	67.6	0.0473	*	57.0	0.0486	*	Ref.			Ref.
40-49 yrs	32.9	69.9			49.3			1.06 (0.96, 1.16)	0.2607	NS	0.85 (0.74, 0.98)	0.0214	*
50-61 yrs	42.5	75.7			47.6			1.11 (1.02, 1.21)	0.0154	*	0.83 (0.72, 0.95)	0.0084	**
Household income
Up to $60,000	35.2	62.9	<0.0001	**	41.0	<0.0001	**	0.78 (0.65, 0.93)	0.0073	**	0.65 (0.50, 0.83)	0.0008	**
$60,001-100,00	32.2	73.9			52.0			0.85 (0.70, 1.04)	0.1154	NS	0.68 (0.51, 0.91)	0.0101	*
>$100,000	32.6	78.6			60.4			Ref.			Ref.
Tooth brushing
Twice a day or more	57.5	78.7	<0.0001	**	57.0	<0.0001	**	1.19 (1.10, 1.28)	<0.0001	**	1.26 (1.10, 1.44)	0.0006	**
Less than twice a day	42.5	62.2			41.7			Ref.			Ref.
Dental insurance
Insured	53.9	83.2	<0.0001	**	60.8	<0.0001	**	1.18 (1.01, 1.36)	0.0316	*	1.13 (0.92, 1.39)	0.2283	NS
Uninsured	46.1	57.7			38.3			Ref.			Ref.
Interaction
Up to $60,000 × Insured	-	-			-			1.28 (1.04, 1.56)	0.0177	*	1.33 (0.97, 1.82)	0.0754	NS
$60,001-100,00 × Insured	-	-			-			1.17 (0.95, 1.45)	0.1454	NS	1.40 (1.01, 1.94)	0.0425	*

Notes.

Chi-Square statistic, *(P < 0.05), **(P < 0.01).

PR: Prevalence Ratio.

†: On average visit a dental practitioner at least once every two years.