J Periodontal Implant Sci.  2019 Jun;49(3):158-170. 10.5051/jpis.2019.49.3.158.

Association between health status and tooth loss in Korean adults: longitudinal results from the National Health Insurance Service-Health Examinee Cohort, 2002–2015

• Kim YT
• Choi JK
• Kim DH
• Jeong SN
• Lee JH

• KMID: 2454086
• DOI: http://doi.org/10.5051/jpis.2019.49.3.158

Abstract

PURPOSE
This study investigated the association between health status and tooth loss based on data from the National Health Insurance Service-Health Examinee Cohort in 2002-2015.
METHODS
Multivariate Cox proportional hazards regression analyses were applied to a longitudinal retrospective database, which was updated and newly released in 2018, to assess the association between health status and tooth loss while adjusting for potential confounders among sociodemographic and economic factors (sex, age, household income, insurance, and presence of disability), general and oral health status (body mass index [BMI], smoking and drinking status, periodic dental visits and scaling, and brushing before sleep), and comorbid disease (hypertension, diabetes mellitus [DM], and Charlson comorbidity index [CCI]).
RESULTS
Among 514,866 participants from a South Korean population, 234,247 (45.5%) participants satisfying the inclusion criteria were analyzed. In the adjusted multivariate analysis, sex, age, household income, insurance, presence of disability, BMI, smoking and drinking status, periodic scaling, tooth brushing before sleep, DM, and CCI showed statistically significant associations with the loss of at least 1 tooth. The risk of experiencing a loss of ≥4 teeth was associated with an increase in age (in those 50-59 years of age: hazard ratio [HR], 1.98; 95% confidence interval [CI], 1.93-2.03; in those 60-69 years of age: HR, 2.93; 95% CI, 2.85-3.02; and in those 70-79 years of age: HR, 2.93; 95%, CI 2.81-3.05), smoking (HR, 1.69; 95% CI, 1.65-1.73), and DM (HR, 1.43; 95% CI, 1.38-1.48).
CONCLUSIONS
The results of this study showed that the risk of experiencing tooth loss was related to multiple determinants. DM and smoking were especially significantly associated with tooth loss.

Keyword

Cohort analysis; Dental caries; Periodontal disease; Tooth extraction; Tooth loss

MeSH Terms

Adult*
Cohort Studies*
Comorbidity
Dental Caries
Diabetes Mellitus
Drinking
Family Characteristics
Humans
Insurance
Multivariate Analysis
National Health Programs*
Oral Health
Periodontal Diseases
Retrospective Studies
Smoke
Smoking
Tooth Extraction
Tooth Loss*
Tooth*
Smoke

Figure

• 

  Figure 1 Flowchart of the inclusion and exclusion of participants in the NHIS-HEC (a South Korean population in 2002–2015) according to their experience of tooth loss. NHIS-HEC: National Health Insurance Service-Health Examinee Cohort.

• 

  Figure 2 The cumulative incidence of tooth loss was estimated using the Kaplan-Meier method.

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