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HbA1c Levels and Long-Term Mortality in Patients Undergoing Coronary Angiography.
Cardiology 2016
OBJECTIVES: Previous studies investigating the prognostic value of HbA1c in patients undergoing coronary angiography reported a mixed pattern of results. Therefore, we aimed to better define the prognostic power of HbA1c among coronary catheterized patients.
METHODS: Patients undergoing coronary angiography (n = 3,749) were divided into four groups according to HbA1c levels (<5, 5-6, 6-7 and >7%). Cox regression models assessed long-term mortality after adjusting for multiple covariates.
RESULTS: Baseline clinical profiles differed in HbA1c groups, with a higher prevalence of comorbidities in the groups with higher HbA1c levels. Median follow-up was 1,745 days (interquartile range 1,007-2,171). A J-shaped association curve was observed between HbA1c levels and all-cause mortality rates, with patients in the lowest and highest HbA1c groups suffering from significantly higher mortality rates compared to in-between groups (hazard ratio 1.9, 95% CI 1.32-2.74, p = 0.001, and hazard ratio 1.58, 95% CI 1.29-1.95, p < 0.001, for the lowest and highest HbA1c groups, respectively). This association persisted after adjustment for anemia, nutritional status, renal function, cardiovascular risk factors and inflammatory biomarkers.
CONCLUSIONS: HbA1c levels <5 or >7% are predictors of all-cause mortality in patients undergoing coronary angiography.
METHODS: Patients undergoing coronary angiography (n = 3,749) were divided into four groups according to HbA1c levels (<5, 5-6, 6-7 and >7%). Cox regression models assessed long-term mortality after adjusting for multiple covariates.
RESULTS: Baseline clinical profiles differed in HbA1c groups, with a higher prevalence of comorbidities in the groups with higher HbA1c levels. Median follow-up was 1,745 days (interquartile range 1,007-2,171). A J-shaped association curve was observed between HbA1c levels and all-cause mortality rates, with patients in the lowest and highest HbA1c groups suffering from significantly higher mortality rates compared to in-between groups (hazard ratio 1.9, 95% CI 1.32-2.74, p = 0.001, and hazard ratio 1.58, 95% CI 1.29-1.95, p < 0.001, for the lowest and highest HbA1c groups, respectively). This association persisted after adjustment for anemia, nutritional status, renal function, cardiovascular risk factors and inflammatory biomarkers.
CONCLUSIONS: HbA1c levels <5 or >7% are predictors of all-cause mortality in patients undergoing coronary angiography.
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