Association of fasting blood glucose with in-hospital mortality in acute coronary syndrome patients with different glycemic statuses: Findings from the CCC-ACS project

Abstract

Background

Fasting blood glucose (FBG) is a significant risk factor for in-hospital mortality in acute coronary syndrome (ACS). This study examines the relationship between FBG levels and outcomes in ACS patients with different glycemic statuses.

Methods and results

Data from 50,365 ACS patients in the CCC-ACS Project (2014–2019) were analyzed in a prospective cohort study. Patients were categorized into three groups based on diabetes history and HbA1c levels: Group A (good), Group B (intermediate), and Group C (poor) glycemic status. A non-linear relationship between FBG and mortality was found. The lowest mortality risks were associated with FBG levels of 4.96 mmol/L (Group A), 5.71 mmol/L (Group B), and 7.44 mmol/L (Group C). Elevated FBG levels were linked to increased mortality risk in all groups: Group A (OR: 1.17), Group B (OR: 1.14), and Group C (OR: 1.10), all p < 0.001. The model showed moderate accuracy (AUC: 0.78 for Groups A/B, 0.80 for Group C)·In Group A, each unit increase in FBG raised the mortality risk by 1.08 times compared to Group B (OR: 1.08, 95 % CI: 1.03–1.14, p = 0.002) and by 1.07 times compared to Group C (OR: 1.07, 95 % CI: 1.03–1.12, p = 0.002).

Conclusions

In ACS patients, elevated FBG is an independent risk factor for in-hospital mortality, regardless of glycemic status. Different glycemic statuses have varied optimal glycemic targets. The effect of FBG on mortality differs across glycemic groups, with patients in good glycemic status facing the highest mortality risk as FBG increases.