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    Association of Red Blood Cell Distribution Width with Coronary Artery Calcification
    (Elsevier Science Inc, 2013) Gurel, Ozgul Malcok; Bilgic, Ayse; Demircelik, Bora; Gunes, Mahmut; Yilmaz, Omer Caglar; Bozduman, Fadime; Kahyalar, Kemal
    [Abstract Not Available]
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    The relationship between 25-hydroxyvitamin D levels and ambulatory arterial stiffness index in newly diagnosed and never-treated hypertensive patients
    (Lippincott Williams & Wilkins, 2016) Malcok Gurel, Ozgul; Bilgic, Ayse; Demircelik, Bora; Ozaydin, Meltem; Bozduman, Fadime; Ayturk, Zubeyde; Yilmaz, Hakki
    ObjectivesVitamin D insufficiency has been shown to be associated with cardiac dysfunctions, such as cardiac hypertrophy and hypertension, in animal studies. Arterial stiffness is a prognostic marker for cardiovascular disease. Previous studies have demonstrated that 25-hydroxyvitamin D [25(OH)D] levels were negatively correlated with arterial stiffness index. The aim of this study was to investigate the relationship between 25(OH)D levels and arterial stiffness, which is evaluated using an ambulatory arterial stiffness index (AASI), in patients who have untreated and newly diagnosed essential hypertension.DesignA total of 123 consecutive patients with newly diagnosed and untreated essential hypertension were included. Patients were divided into two groups according to their 25(OH)D levels. Vitamin D insufficiency was defined by 25(OH)D levels less than 20ng/ml. All patients were referred for ambulatory blood pressure monitoring. The regression slope of diastolic and systolic blood pressure was computed for each individual on the basis of ambulatory blood pressure readings. AASI was described as one minus the respective regression slope.ResultsThe mean AASI was significantly higher in patients with 25(OH)D levels less than 20 as compared with patients with 25(OH)D levels greater than or equal to 20 (0.500.20 vs. 0.34 +/- 0.17, P<0.001). In Pearson's correlation analysis, AASI had a significantly strong negative correlation with vitamin D levels (r=-0.385, P<0.001). In multivariate linear regression analysis, vitamin D levels were found to be significantly and independently associated with AASI (=-0.317, P=0.035).ConclusionArterial stiffness measured by AASI in newly diagnosed and untreated patients with essential hypertension were significantly related to vitamin D levels.