Objective: The purpose of this study was to determine the relationship between age-specific body mass index (BMI) and dental caries among pre-school children of district of Patna, Bihar, India. Methods & Materials: The design of our study was analytical cross-sectional was conducted on 350 healthy preschool children with the age range of 3-6 years studying in preschool classes of district of Vaishali, Bihar. The measurements of height and weight were evaluated and calculating the z-scores using WHO Anthro-software to elucidate the subject’s status on the ageand sex-specific growth chart. The data was analyzed using Statistical Package for Social Sciences (SPSS) version 16. The statistical tests used were t-test and correlation analysis. Results: The Prevalence of dental caries was 68.57% with a mean dental caries score of 2.82 ± 2.03. Among the study participants 38.57% were underweight, 47.71% had height deficiency and 44.57% had BMI deficiency (BAZ score). There was significant positive correlation found between children’s WAZ (Weight for age) [r=0.102, p=0.040], BAZ (BMI for age) [r= 0.761, p= 0.032] and dental caries. Conclusions: This study showed that fewer percentage of the participants had deficient height, weight and BMI. As there is increase in the weight and BMI, there was a significant increase in the number of caries and dental restoration among the children’s.
Key words: Pre-School Children, Dental Caries, BMI, Height and Weight.