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Effect of family history of type-2 diabetes on coronary flow reserve and it’s relationship with insulin resistance: an observational stud y

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Author(s): Mustafa Çalışkan | Barış Önder Pamuk | Hakan Güllü | Özgür Çiftçi | Zuhal Çalışkan | Doğan Erdoğan | Aytekin Güven | Ezgi Polat | Haldun Müderrisoğlu

Journal: Anadolu Kardiyoloji Dergisi
ISSN 1302-8723

Volume: 13;
Issue: 1;
Start page: 48;
Date: 2013;
Original page

Keywords: Coronary flow reserve | diabetes | heritage | regression analysis

ABSTRACT
Objective: Coronary microvascular function among offspring of patients with diabetes mellitus might be compromised when compared to persons with no first-degree relative with diabetes mellitus. The aim of the study was to evaluate effect of family history of type-2 diabetes on coronary flow reserve. Methods: In this observational study, we evaluated coronary flow reserve (CFR) via echocardiography of 95 subjects having a biological parent with type-2 diabetes and 34 healthy volunteers without any biological parent with type-2 diabetes. We have analyzed possible association with CFR and homeostasis model assessment - insulin resistance (HOMA-IR). Comparison analyses were made using independent samples t test, Chi-square test and one-way ANOVA. Association of independent variables with CFR was obtained by correlation analysis and stepwise linear regression model including potential confounders. Results: CFR was significantly lower in the positive family history group than in the controls. Moreover, when compared with controls, the subgroup of insulin-sensitive subjects in the positive family history group also had significantly reduced CFR (2.67±0.28 vs. 2.83±0.19; p=0.01). Correlation analysis revealed that CFR was inversely correlated with HOMA-IR, (r=-0.433), fasting glucose (r=-0.331), fasting insulin (r=-0.396), and hemoglobin (Hb)A1c (r=-0.405). When the positive family history group was divided into tertiles of insulin resistance (HOMA-IR 2.6; Groups 1-2, and 3), there was a significant difference in CFR between Groups 1 and 2 and between Groups 1 and 3 (p

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