Table 4 Matched pair analysis for time to dental restoration failure by cases and controls with covariates for only positive cases and controls (n = 63)

Patient Type + Age^a

Patient Type

Case vs. Control

3.293 (1.456, 7.449)

0.004*

Age

Each 1-Year Change

1.003 (0.968, 1.040)

0.852

Patient Type + Sex^a

Patient Type

Case vs. Control

2.990 (1.290, 6.930)

0.011*

Sex

Female vs. Male

0.450 (0.098, 2.072)

0.305

Patient Type + Race^a

Patient Type

Case vs. Control

3.149 (1.405, 7.060)

0.005*

Race

0.256

Black vs. White

0.341 (0.086, 1.357)

0.127

Unknown vs. White

0.609 (0.191, 1.941)

0.402

Patient Type + Dental Insurance^a

Patient Type

Case vs. Control

3.220 (1.458, 7.112)

0.004*

Dental Insurance

Other vs. Self-Pay

1.182 (0.675, 2.069)

0.559

Patient Type + Medical Insurance ^b

Patient Type

Case vs. Control

2.880 (1.295, 6.407)

0.010*

Medical Insurance

0.094

Commercial vs. Public

1.590 (0.673, 3.754)

0.290

Other vs. Public

7.637 (0.790, 73.864)

0.079

Patient Type + Presence of Medical Diagnosis^c

Patient Type

Case vs. Control

3.779 (1.594, 8.958)

0.003

Presence of Diagnosis

Yes vs. No

0.457 (0.106, 1.962)

0.292

Patient Type + Medication Use^a

Patient Type

Case vs. Control

3.587 (1.595, 8.068)

0.002*

Medication Use

Yes vs. No

0.143 (0.012, 1.673)

0.121

Patient Type + Preventive Visit Rate per year^a,d

Patient Type

Case vs. Control

3.142 (1.370, 7.205)

0.007*

Preventive visit

Each 1-visit increase

0.933 (0.683, 1.275)

0.663

Patient Type + Surface Number^a

Patient Type

Case vs. Control

2.930 (1.388, 6.187)

0.005*

Surface Number

0.019*

2 vs. 1

2.129 (1.186, 3.822)

0.011*

3 + vs. 1

2.376 (1.201, 4.702)

0.013*

3 + vs. 2

1.116 (0.561, 2.221)

0.754