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Factors Related to the Number of Existing Teeth Among Korean Adults Aged 55-79 Years


Factors Related to the Number of Existing Teeth Among Korean Adults Aged 55-79 Years

Jung-Ha Lee et al. Int J Environ Res Public Health.


This study aimed to determine the association between the number of existing teeth (NET) and socioeconomic status (SES), oral health-related behaviours, and metabolic syndrome in Korean adults aged 55-79 years. The study included 3255 adults who underwent oral health examinations and answered questionnaires regarding SES, oral health-related behaviours, and metabolic diseases in the Sixth Korea National Health and Nutrition Examination Survey (2013-2015). The dependent variable was the binary status based on the median NET in each age group. The independent variables were based on SES, oral health-related behaviours, and the presence of metabolic syndrome. The study findings showed that the factors associated with the NET were sex, household income, education level, region of residence, daily toothbrushing frequency, dental visit within 1 year, smoking, and metabolic syndrome. NET was lower in males (adjusted OR: 0.74), in low household income group (adjusted OR: 0.77), in primary school graduates (adjusted OR: 0.53), in rural residents (adjusted OR: 0.78), and in medicaid beneficiaries (adjusted OR: 0.78). The interventions aimed at preserving existing teeth in elderly population should consider their SES, oral health-related behaviours, and metabolic syndrome and overhauling current oral healthcare system and redefining the roles of oral health professionals.

Keywords: dental caries; metabolic syndrome; oral health behaviour; periodontitis; socioeconomic status; tooth loss.

Conflict of interest statement

The authors declare no conflict of interest.

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    1. Padilha D.M., Hilgert J.B., Hugo F.N., Bós A.J., Ferrucci L. Number of teeth and mortality risk in the Baltimore Longitudinal Study of Aging. J. Gerontol. Ser. A Biol. Sci. Med. Sci. 2008;63:739–744. doi: 10.1093/gerona/63.7.739. - DOI - PMC - PubMed
    1. Lee J.H., Choi J.K., Jeong S.N., Choi S.H. Charlson comorbidity index as a predictor of periodontal disease in elderly participants. J. Periodontal Implant Sci. 2018;48:92–102. doi: 10.5051/jpis.2018.48.2.92. - DOI - PMC - PubMed
    1. Petersen P.E., Kandelman D., Arpin S., Ogawa H. Global oral health of older people-call for public health action. Community Dent. Health. 2010;27(Suppl. 2):257–267. - PubMed
    1. Health Insurance Review & Assessment Service . Healthcare Service Reimbursement by the Ranking of Multi-Frequency Occurring Diseases According to the List of Three-Character Categories of Korea Standard Classification of Diseases and Cause of Death: Out-Patients. Ministry of Health and Welfare; Seoul, Korea: 2017. pp. 59–62.
    1. Kim H.N., Ha T.G., Kim M.J., Jun E.J., Jeong S.H., Kim J.B. Factors related to number of present teeth in Korean elderly adults aged 55–84 years. Int. J. Dent. Hyg. 2016;14:151–158. doi: 10.1111/idh.12151. - DOI - PubMed

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