Background:
Dental caries remains one of the most prevalent diseases worldwide, affecting 36% of the global population. Despite numerous efforts to diagnose, predict, and prevent this condition, the incidence continues to rise. Considering the emerging connection between oral and systemic health, it is worth exploring the various factors associated with this widespread disease. Notably, the level of C-reactive protein (CRP), a marker of inflammation, has been identified as a risk factor for several health conditions, including periodontal disease. This study investigates the association between CRP levels and dental caries within the United States, utilizing data from the National Health and Nutrition Examination Survey (NHANES).
Methods
The study analyzed data from the 2015–2018 NHANES cycles, focusing on a nationally representative sample of individuals aged 30–65 years. Weighted multivariable Poisson and logistic regression analyses were employed to explore the relationship between dental caries and CRP levels, adjusting for age, gender, race, education level, diabetes status, and gum disease.
Results
Our analysis revealed a statistically significant positive association between CRP levels and dental caries. Specifically, 40.4% of participants with dental caries exhibited elevated CRP levels. The age group of 45–64 years displayed the highest prevalence of increased CRP levels (34.8%). Regression analyses further substantiated the association, with the Poisson regression indicating a 60% increase in the Adjusted Mean Ratio (AMR) of dental caries for higher CRP levels (AMR: 1.6, p-value: <0.01) and the logistic regression analysis showed that individuals with higher CRP levels have a 50% increase in the odds of developing dental caries (AOR: 1.5, p-value: <0.01).
Conclusion
The results of this cross-sectional study of the U.S. population highlight the positive association between increased CRP levels and the prevalence of dental caries. These findings contribute to the growing body of evidence supporting the integration of oral and systemic health care. Further research is necessary to deepen our understanding of the mechanistic relationship between CRP levels and dental caries.