Evaluating correlation of ABO blood group, dental caries and gingivitis among the Indian population.

Dental caries and gingivitis are highly prevalent worldwide, with limited evidence on the role of ABO blood groups in influencing susceptibility among Indians. A cross-sectional study was conducted on 600 adults, with blood groups determined serologically; caries assessed using the DMFT index and gingivitis using the Gingival Index. Blood group O showed the highest mean DMFT (4.82 ± 2.15) and gingivitis prevalence (82.6%), with significant differences across groups (p<0.01). Logistic regression identified group O as an independent predictor for high caries (OR=2.15) and gingivitis (OR=1.94). Blood group O may represent a non-modifiable risk factor for poor oral health, highlighting the need for targeted preventive strategies.