Blood Routine Test Parameters Score, a Novel Predictor of Adverse Outcomes of Coronary Artery Disease Patients with or without Diabetes Who Underwent Percutaneous Coronary Intervention: A Retrospective Cohort Study

[Image: see text] Background: In this study, we developed a novel risk score named the blood routine test parameters (BRTP) score to predict the clinical outcomes in coronary artery disease (CAD) patients who had undergone percutaneous coronary intervention (PCI). Methods: There were 6049 patients with CAD after PCI enrolled in CORFCHD-PCI from January 2008 to December 2016. We divided these patients into two groups according to diabetes (diabetic group, n = 3809, and nondiabetic group, n = 2240). During a follow-up time of 35.9 ± 22.6 months, we compared the incidences of all-cause mortality (ACM) and cardiac mortality (CM), which were assigned as the primary outcomes between patients with a high BRTP score (≥5 points) and those with a low BRTP score (<5 points). Results: We found that the BRTP score independently predicted the risk for ACM and CM in both diabetic patients [ACM, hazard risk (HR) = 1.748 (95% confidence interval (CI): 1.186–2.575), P = 0.005; CM, HR = 1.728 (95% CI: 1.120–2.667), P = 0.014] and nondiabetic patients [ACM, HR = 1.682 (95% CI: 1.208–2.340), P = 0.002; CM, HR = 1.718 (95% CI: 1.188–2.484), P = 0.004]. However, the BRTP score was found to be an independent predictor for major adverse cardiovascular event (MACE) and major adverse cardiovascular and cerebrovascular event (MACCE) in diabetic patients [MACE, HR = 1.366 (95% CI: 1.076–1.734), P = 0.010; MACCE, HR = 1.330 (95% CI: 1.035–1.710), P = 0.026] but not in nondiabetic patients [MACE, HR = 1.241 (95% CI: 0.994–1.549), P = 0.056; MACCE, HR = 1.238 (95% CI: 0.981–1.562), P = 0.072]. Conclusions: This study suggests that the BRTP score is an independent and novel predictor of mortality in CAD patients who had undergone PCI, especially in patients with comorbidity of diabetes. Trial registration: ChiCTR-ROC-16010153. Registered 14, December, 2016.