Hormonal
In individuals with type 2 diabetes who carry the haptoglobin (Hp) 2-2 phenotype, maintaining an HbA1c level below 6.5% does NOT significantly reduce the risk of coronary artery disease compared to levels of 7.0-7.9%.
If you have type 2 diabetes and have the haptoglobin 2-2 genetic variant, aiming for an HbA1c below 6.5% may not provide additional protection against heart disease compared to levels of 7.0-7.9%. This suggests that overly aggressive glycemic control might not be necessary or beneficial for cardiovascular health in this specific group.
having HbA1c < 6.5% compared with 7.0-7.9% was not significantly associated with a lower risk of CAD among participants with the Hp2-2 phenotype (aHR 0.80, 95% CI 0.57–1.12)
Why this rating
Large sample size and rigorous statistical adjustment, though the finding is a null result which can be harder to interpret definitively.
Source
The relationship between repeated measurements of HbA1c and risk of coronary events among the common haptoglobin phenotype groups: the Action for Health in Diabetes (Look AHEAD) study
Allie S. Carew et al. · Cardiovascular Diabetology · 2024
DOI 10.1186/s12933-024-02448-z
More from this paper
- In individuals with type 2 diabetes who do not carry the haptoglobin (Hp) 2-2 phenotype, maintaining an HbA1c level below 6.5% is associated with a significantly lower risk of coronary artery disease compared to maintaining levels between 7.0% and 7.9%.Good
- In individuals with type 2 diabetes who carry the haptoglobin (Hp) 2-2 phenotype AND have a history of cardiovascular disease, maintaining an HbA1c level of 8.0% or higher is associated with an increased risk of coronary artery disease compared to levels of 7.0-7.9%.Moderate
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