Table 2 Distributions and dental visiting by sex, age, income, tooth brushing, and insurance

%

%

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

*