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Table 4 Factors related to the incidence of dementia according to the number of teeth lost

From: The effect of missing teeth on dementia in older people: a nationwide population-based cohort study in South Korea

Variables

Odds Ratio Estimates

p-value

Point Estimate

95% Wald Confidence Limits

The number of teeth lost

 1–6 (standard = 0)

1.158

1.124

1.194

<.0001a

 7–12 (standard = 0)

1.272

1.210

1.338

<.0001a

 ≥13 (standard = 0)

1.313

1.179

1.461

<.0001a

Female (standard = male)

1.330

1.290

1.371

<.0001a

Age

 70–79 (standard = 60–69)

1.879

1.824

1.936

<.0001a

 ≥80 (standard = 60–69)

2.379

2.216

2.553

<.0001a

 Urban resident (standard = rural resident)

1.329

1.293

1.366

<.0001a

Eligibility

 Family member (standard = head of household)

1.005

0.975

1.035

0.7450

 Medical aid beneficiaries (standard = head of household)

1.499

1.416

1.588

<.0001a

Income level

 Second quintile (standard = first quintile)

0.979

0.930

1.032

0.4328

 Third quintile (standard = first quintile)

0.947

0.900

0.996

0.0353a

 Fourth quintile (standard = first quintile)

0.939

0.896

0.984

0.0084a

 Fifth quintile (standard = first quintile)

0.952

0.911

0.995

0.0290a

History of periodontal treatment (standard = no history)

0.961

0.931

0.991

0.0113a

History of dental caries (standard = no history)

1.064

1.032

1.097

<.0001a

  1. aStatistically significant at a 95% confidence interval