Association between Obesity and Dental Caries in Adults: An Analysis of WHR, and DMFT Score

Abstract

Introduction: The relationship between obesity and dental caries in adults presents inconsistent findings in current literature, which necessitates further research to clarify this relationship. This study aimed to examine the association between obesity and dental caries in adults using a nationally representative sample. Methods: This study employed data of US adults aged >20 years from the National Health and Nutrition Examination Survey (NHANES) pre-pandemic cycle. Obesity was defined using the waist-to-hip ratio (WHR), body mass index (BMI), and waist circumference. Dental caries were assessed using the Decayed, Missing, Filled Teeth (DMFT) scores. Results: Most participants were categorized as individuals with obesity based on the WHR (74.5%) or BMI (72.7%). A significant difference in the DMFT scores and missing teeth was observed between individuals with normal weight and individuals with obesity. After adjusting for the sociodemographic variables, individuals with obesity had a 0.11 higher DMFT score (95% confidence interval [CI]: −0.01 to 0.23). A significant association was observed between the WHR and DMFT scores when age was excluded from the model, demonstrating a higher coefficient of 0.17 (95% CI: 0.05–0.30). Conclusions: A positive association was observed between obesity and dental caries in the US adult population. However, age was found to be a confounding factor in this relationship. This study highlights the relationship between oral and general health, advocating healthcare providers for an integrated health promotion strategy, through comprehensive campaigns addressing obesity, diet, lifestyle, and dental health, aiming for raising awareness and a more effective public health strategy.

Keywords

• obesity
• dental caries
• waist-to-hip ratio
• body mass index
• national health and nutrition examination survey
• decayed, missing, filled teeth