Korean Journal of Community Nutrition

Research Article

[English]
Association between number of teeth and oxidative balance score in Korean adults: a population-based study: Jung-Eun Park; Korean J Community Nutr 2026;31(1):64-74. Published online February 28, 2026; DOI: https://doi.org/10.5720/kjcn.2025.00325

Abstract PDF: Objectives
This study aimed to evaluate the relationship between oxidative balance score (OBS), a metric indicating an individual’s oxidative balance status, and the number of teeth in a sample of Korean adults.
Methods
This cross-sectional study included 13,199 adults aged 19 and older who participated in a health survey and oral examination. Subsequent to the adjustment for confounding factors, a logistic regression analysis was employed to evaluate the probability of a subject belonging to a number of teeth category based on OBS level.
Results
In the group with OBS level T2, the likelihood of having NT1 (0–10 teeth) was found to be significant adjusted for all variables (odds ratios: 1.51, 95% confidence intervals: 1.195–1.908). In the multinomial model, a significant association was observed for the NT1 category, whereas no significant association was found for the NT2 (11–20 teeth) category after adjustment.
Conclusion
In the group with OBS level T2, the likelihood of having NT1 (0–10 teeth) was found to be significant. As this study examines cross-sectional associations, the necessity of conducting longitudinal research as subsequent studies is evident to ascertain the existence of causality.

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