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Table 3 Factors affecting dental expenses per visit (generalized estimating equations)

From: Disparity in access for people with disabilities to outpatient dental care services: a retrospective cohort study

Variables

Categories

Coefficient (coef)

Exp (coef)

95% CI

p-value

Lower

Upper

Sex (Ref: Female)

Male

-0.0005

1.000

-0.010

0.009

0.921

Age (Ref: ≥ 65 years)

< 20 years

0.667

1.948

0.654

0.679

< 0.001

20–64 years

0.137

1.146

0.127

0.146

< 0.001

Residential areas (Ref: Large cities)

Small cities

-0.015

0.985

-0.032

0.003

0.103

Rural areas

-0.003

0.997

-0.022

0.016

0.759

RSDC a (Ref: No)

Yes

-0.096

0.908

-0.109

-0.084

< 0.001

Medical aid (Ref: No)

Yes

0.105

1.110

0.068

0.141

< 0.001

Income (Ref: Low)

Middle

-0.005

0.995

-0.019

0.009

0.479

High

0.052

1.054

0.037

0.068

< 0.001

Disabled (Ref: No disabilities)

Mild

0.063

1.065

0.036

0.091

< 0.001

Severe

-0.006

0.994

-0.048

0.036

0.790

Interaction Term RSDC a: Disabilities

RSDC (Yes): Mild

-0.082

0.921

-0.137

-0.027

0.003

RSDC (Yes): Severe

-0.134

0.875

-0.222

-0.046

0.003

  1. a RSDC Regular source of dental care, CI: Confidence interval