Background This study aimed to examine the relationship between oral health status and hygiene behavior among adults and elderly with preceding chronic disease or coronary artery disease history. Methods Data were obtained from the Korea National Health and Nutrition Examination survey conducted from 2016 to 2017. Cardiovascular risk group was defined as adults over the age of 30 with hypertension, diabetes, dyslipidemia, previous myocardial infarction, or angina. Adult and elderly groups were

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... eparated and analyzed by 1:1 propensity score matching (PSM), and complex sample logistic regression analysis was performed using SPSS and R programs. Results In adults, 25.1% of healthy group and 41.9% of the risk group were diagnosed with periodontal disease by dentist. In the elderly, 40.0% of the risk group had chewing problems and 17.5% had speaking problems. After PSM, in adults (n = 1661 each), both univariate and multiple logistic regression analyzes showed that the prevalence of periodontal disease was significantly higher in the risk group than in the healthy group (Odds Ratio = 1.21, p = .028). In the elderly (n = 715 each), univariate analysis showed that the risk group had more chewing and speaking problems than the healthy group, but there was no difference in multivariate analysis. Conclusions Adults under the age of 65 years with cardiovascular risk require periodic evaluation and education on the importance of maintaining oral health for primary or secondary prevention. Healthcare professionals should provide patient education to help them maintain adequate oral health and oral hygiene.