BMJ open diabetes research & care · 2025
Relationship between time-varying achieved HbA1c and risk of coronary artery disease events among common haptoglobin phenotype groups with type 2 diabetes: the ADVANCE study.
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Cahill Leah E, Warren Rachel A, Lavallée Samantha K, Levy Andrew P, Carew Allie S, Sapp John, Samuel Michelle, Selvin Elizabeth, Poulter Neil, Marre Michel, Harrap Stephen, Mancia Giuseppe, Harris Katie, Chalmers John, Woodward Mark, Rimm Eric
Аннотация
INTRODUCTION: This study sought to determine whether the association between attaining specific glycated hemoglobin (HbA1c) targets (<7.0% (<53 mmol/mol) and ≥8.0% (≥64 mmol/mol) compared with 7.0%-7.9%) over time and risk of incident coronary artery disease (CAD) was dependent on haptoglobin (Hp) phenotype in the Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified Release Controlled Evaluation (ADVANCE) study.
RESEARCH DESIGN AND METHODS: Prospectively collected HbA1c data from the ADVANCE biomarker case-cohort study, updated at 6 months and every 12 months thereafter over a median of 5.0 (IQR 4.5-5.3) years, were analyzed in relation to incident CAD in the Hp2-2 (n=1323) and non-Hp2-2 (n=2069) phenotypes separately using weighted multivariable-adjusted Cox regression models. Additional a priori stratifications by sex, race, previous cardiovascular disease (CVD), and type 2 diabetes duration were performed.
RESULTS: Mean HbA1c was similar in each phenotype group throughout the study. Compared with HbA1c of 7.0%-7.9%, HbA1c <7.0% was not associated with CAD risk for any phenotype group or subgroup. HbA1c ≥8.0% compared with 7.0%-7.9% over time was associated with higher CAD risk for the Hp2-2 phenotype only (HR 1.53, 95% CI 1.01 to 2.32; no significant association in the non-Hp2-2 type: 1.26, 0.89 to 1.77, p-interaction=0.71); this was pronounced when those with previous CVD at baseline were excluded (Hp2-2: 2.80, 1.41 to 5.53, p-interaction=0.03). Compared with HbA1c of <8.0%, having HbA1c ≥8.0% was associated with a 59% higher CAD risk among participants with the Hp2-2 phenotype (1.59, 1.12 to 2.26) and a 39% higher CAD risk among participants without the Hp2-2 phenotype (1.39, 1.03 to 1.88, p-interaction=0.97).
CONCLUSIONS: The present ADVANCE analysis suggests that not having HbA1c ≥8.0%, rather than achieving HbA1c <7.0%, was found to be particularly important for CAD prevention among people with type 2 diabetes and the common Hp2-2 phenotype. While the subgroup analyses were likely underpowered, their inclusion is hypothesis generating and can be used in future meta-analyses to improve power and generalizability.
RESEARCH DESIGN AND METHODS: Prospectively collected HbA1c data from the ADVANCE biomarker case-cohort study, updated at 6 months and every 12 months thereafter over a median of 5.0 (IQR 4.5-5.3) years, were analyzed in relation to incident CAD in the Hp2-2 (n=1323) and non-Hp2-2 (n=2069) phenotypes separately using weighted multivariable-adjusted Cox regression models. Additional a priori stratifications by sex, race, previous cardiovascular disease (CVD), and type 2 diabetes duration were performed.
RESULTS: Mean HbA1c was similar in each phenotype group throughout the study. Compared with HbA1c of 7.0%-7.9%, HbA1c <7.0% was not associated with CAD risk for any phenotype group or subgroup. HbA1c ≥8.0% compared with 7.0%-7.9% over time was associated with higher CAD risk for the Hp2-2 phenotype only (HR 1.53, 95% CI 1.01 to 2.32; no significant association in the non-Hp2-2 type: 1.26, 0.89 to 1.77, p-interaction=0.71); this was pronounced when those with previous CVD at baseline were excluded (Hp2-2: 2.80, 1.41 to 5.53, p-interaction=0.03). Compared with HbA1c of <8.0%, having HbA1c ≥8.0% was associated with a 59% higher CAD risk among participants with the Hp2-2 phenotype (1.59, 1.12 to 2.26) and a 39% higher CAD risk among participants without the Hp2-2 phenotype (1.39, 1.03 to 1.88, p-interaction=0.97).
CONCLUSIONS: The present ADVANCE analysis suggests that not having HbA1c ≥8.0%, rather than achieving HbA1c <7.0%, was found to be particularly important for CAD prevention among people with type 2 diabetes and the common Hp2-2 phenotype. While the subgroup analyses were likely underpowered, their inclusion is hypothesis generating and can be used in future meta-analyses to improve power and generalizability.