Hamadan University of Medical Sciences Avicenna Journal of Dental Research 2423-7582 8 3 2016 09 01 The Correlation Between Body Mass Index and Oral Health in 12-Year-Old Students in Tehran During 2011 7 7 10.17795/ajdr-27769 EN Afrooz Nakhostin Ghasem Meighani Ahmad Abbasi Ahmad Reza Shamshiri Journal Article 10.17795/ajdr-27769 2015 02 22 2015 06 07 Background: The growing prevalence of being overweight and obesity in children has raised significant public health concerns. Obesity is considered a risk factor for several chronic health conditions and is associated with increased mortality. In addition, recent studies have shown an association between obesity and periodontal disease. Objectives: The present study sought to assess the correlation of body mass index (BMI) with periodontal disease. Materials and Methods: A total of 1,024 12-year-old elementary school students were selected by cluster sampling from five regions of Tehran. BMI was used as a measure of being overweight and obesity, and the oral hygiene index (OHI) was used to assess periodontal disease. A linear regression model was applied to estimate the association between BMI and OHI. The parents’ level of education and family income were also evaluated. Results: A significant association was found between BMI and OHI (P = 0.001). Also, a significant reverse correlation was detected between the parents’ education level with OHI (P < 0.05). Conclusions: Obesity is not a potential risk factor for periodontal disease in children of low-income families. However, periodontal disease is associated with increased BMI. Promotion of healthy nutrition and adequate physical activitymay prevent the progression of periodontal disease.