نتایج جستجو برای: hydroxyvitamin d
تعداد نتایج: 578040 فیلتر نتایج به سال:
Background: The effect of season on vitamin D status is often overlooked in studies of optimal vitamin D concentrations and in
OBJECTIVE To test the hypothesis that genetically low 25-hydroxyvitamin D concentrations are associated with increased mortality. DESIGN Mendelian randomisation analysis. SETTING Copenhagen City Heart Study, Copenhagen General Population Study, and Copenhagen Ischemic Heart Disease Study. PARTICIPANTS 95 766 white participants of Danish descent from three cohorts, with median follow-up ti...
OBJECTIVES The high sensitivity-C reactive protein (hs-CRP) is an inflammatory marker and vitamin D is an immune modulator that might play a critical role in the pathogenesis of hyperemesis gravidarum. Therefore, in the current study, we tested the hypothesis that suggests women with hyperemesis gravidarum have lower 25-hydroxyvitamin D levels and higher hs-CRP levels, compared to controls. M...
OBJECTIVE To assess whether there was an independent association between maternal 25-hydroxyvitamin D concentrations at 24-28 weeks of gestation and preterm birth in a multicenter U.S. cohort of twin pregnancies. METHODS Serum samples from women who participated in a clinical trial of 17 α-hydroxyprogesterone caproate for the prevention of preterm birth in twin gestations (2004-2006) were ass...
BACKGROUND AND OBJECTIVES Vitamin D deficiency (defined by serum levels of 25-hydroxyvitamin D) is common in patients with ESRD on hemodialysis, but risk factors are unknown. This study was conducted to determine whether routinely measured clinical and demographic parameters could identify dialysis patients who are vitamin D deficient. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS Nine-hundre...
Few modifiable factors are known to reduce ovarian cancer risk. Ecologic studies and experimental data suggest that vitamin D may reduce ovarian cancer risk. Therefore, we examined whether plasma concentrations of 25-hydroxyvitamin D (a measure of overall vitamin D status) and 1,25-dihydroxyvitamin D (biologically active form) were associated with risk of epithelial ovarian cancer in a nested-c...
Background: Vitamin D deficiency is prevalent in the population, especially older people. In recent years, studies have revealed an association between a low vitamin level and cognitive decline. The present research aimed to investigate relationship of serum 25-hydroxyvitamin (25-OH-D) with function senior patients.
Background and Objective: Previous studies indicate an inverse association of serum 25-hydroxyvitamin-D level with obesity, metabolic syndrome and cardiovascular events. This study was aimed to assess metabolic syndrome correlation with serum Vit-D levels of physicians in Zanjan city (Iran). Materials and Methods: In an analytical cross-sectional study, a total of 108 physicians were selected a...
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