Abstract 13740: Validation of Paris Risk Score to Predict Long-term Bleeding Events After Percutaneous Coronary Intervention in Japanese Population

Introduction: It has been reported that East Asian people have higher bleeding risks than Western people. The Patterns of non-Adherence to Anti-Platelet Regimen in Stented Patients (PARIS) bleeding risk score was developed to estimate the bleeding risk after percutaneous coronary intervention (PCI). However, the utility of PARIS bleeding score for predicting long-term bleeding risks has not been validated in Japanese population. Methods: Consecutive 1061 patients who underwent PCI and survived to discharge were divided into three groups based on the category of PARIS bleeding risk score: low risk group (0-3 risk points), intermediate risk group (4-7 risk points) and high risk group (8-15 risk points), then we compared patient characteristics and followed bleeding events. Results: The numbers of patients at low, intermediate and high risk groups were 113 (10.7%), 420 (39.6%) and 528 (49.8%), respectively. Clinical characteristics for three groups were as follows: atrial fibrillation (low, intermediate and high risk groups; 8.2%, 8.9% and 21.6%, P < 0.001, respectively), peripheral artery disease (3.1%, 9.1% and 22.1%, P < 0.001), coronary multi-vessel disease (38.9%, 44.3% and 54.4%, P = 0.001), use of statin (97.3%, 89.6% and 71.7%, P < 0.001) and proton-pump inhibitors (69.1%, 72.5%, and 78.9%, P = 0.02). Among 1061 patients, a total of 74 bleeding events were occurred during the follow-up period (mean of 1742 days). In the Kaplan-Meier analysis, the cumulative incidence of bleeding events significantly increased from low risk group to intermediate and high risk group (P < 0.001). The risk score showed a significant prognostic value in predicting bleeding events (area under the receiver operating characteristic curve, 0.674; 95% confidence interval, 0.615-0.733). Conclusions: The PARIS bleeding risk score successfully stratified the long-term bleeding risk in patients with coronary artery disease after PCI in Japanese population.