The association between periodontal disease and coronary artery disease: insights from imaging, observational and genome-wide data

Abstract Background Periodontal disease is the sixth most common disease worldwide. It has been suggested that it may be a contributory risk factor for coronary artery disease (CAD). From a public health perspective, prevention of periodontal disease is relatively straightforward and cost-effective: daily brushing, flossing and, where applicable, smoking cessation. Purpose This study utilises imaging, longitudinal and genomic data to characterise the association between periodontal disease and CAD. Methods 481,915 individuals from the UK Biobank were included in this study, 18.9% (n = 91,022) of whom had self-reported periodontal disease. For the imaging analysis, a maximum of 59,019 had paired cardiovascular magnetic resonance (CMR) data. Multivariable linear regression models were constructed to examine the association of periodontal disease on CMR outcomes with LV end-diastolic volume, LV mass, LV mass:volume ratio (MVR), LV ejection fraction, LV global longitudinal strain and native T1 values considered as prognostically important phenotypes. The relationship between periodontal disease and incident CAD was assessed using Cox proportional hazards regression models. To examine the relationship of genetically-determined periodontal disease on CAD, a de novo GWAS for periodontal disease was performed and a genome-wide polygenic risk score (PRS) was constructed. Results Periodontal disease was associated with a significantly higher LV MVR (effect size = 0.00233, 95% confidence interval [CI] = 0.0006, 0.004) and significantly lower LV native global T1 value (effect size = -0.86 ms, 95% CI = -1.63, -0.09). The presence of periodontal disease was independently associated with a significantly increased hazard of incident CAD (HR = 1.09, 95% CI = 1.07, 1.13) at a median follow-up time of 13.8 years (Figure 1). Each standard deviation increase in the periodontal disease PRS was associated with increased odds of CAD (OR = 1.03, 95% CI = 1.02, 1.05) (Figure 2). Conclusion Using an integrated approach across imaging, observational and genomic data, periodontal disease is independently associated with biomarkers of subclinical remodelling as well as incident CAD. These findings highlight the potential importance of periodontal disease in the broader context of cardiovascular disease prevention.