25-hydroxyvitamin D

02/01/2006 - "Measurement of serum total 25-hydroxyvitamin D concentration is the gold standard to diagnose vitamin D deficiency. "
01/01/2013 - "The mean serum 25-hydroxyvitamin D level was 19.8 ± 11.1, with 54% of the study population having vitamin D deficiency. "
11/01/2011 - "Although numerous studies deal and have dealt with vitamin D deficiency and its consequences, experts cannot agree on the right 25-hydroxyvitamin D levels. "
11/01/2006 - "In our total study population, prevalence of vitamin D deficiency, defined as a 25-hydroxyvitamin D concentration < 10 microg/L, was high (24%): one in eight Caucasians, one in four Black Afro-Caribbeans and one in three Asians were found to be deficient. "
12/01/1998 - "Of 218 children evaluated, no child in the study had a 25-hydroxyvitamin D (25-OHD) concentration <10 ng/mL (the generally held definition of vitamin D deficiency). "

02/01/2014 - "Serum 25-hydroxyvitamin D level as an independent determinant of quality of life in osteoporosis with a high risk for fracture."
01/01/2014 - "Testing for 25-hydroxyvitamin D is in part directed toward populations at higher risk of deficiency (visible minorities) and at higher risk of osteoporosis (older females), but a particularly high risk group (recent immigrants) is being tested at a lower rate than other patient groups."
12/01/2013 - "It is well established that adequate serum 25-hydroxyvitamin D levels correlate with a reduction in the incidence of osteoporosis; however, the physiological basis for this relationship remains elusive. "
10/21/2013 - "In contrast, a large body of clinical data indicate that an adequate serum 25-hydroxyvitamin D level improves bone mineral density protecting against osteoporosis and reducing fracture risk. "
10/01/2012 - "What is the therapeutic target level of 25-hydroxyvitamin D in osteoporosis and how accurately can we measure it?"

07/01/2008 - "In study A, the adjusted odds for 25-hydroxyvitamin D deficiency were 32% higher in chronic kidney disease patients. "
07/01/2008 - "Recent studies show high prevalence of suboptimal 25-hydroxyvitamin D levels in chronic kidney disease patients. "
01/01/2016 - "Prevalence and correlates of 25-hydroxyvitamin D deficiency in the Chronic Kidney Disease in Children (CKiD) cohort."
03/01/2015 - "The relationship between the level of serum 25-hydroxyvitamin D and renal function in patients without chronic kidney disease: a cross-sectional study."
10/01/2014 - "The benefits of and thresholds for 25-hydroxyvitamin D administration in individuals with chronic kidney disease (CKD) remain uncertain. "

12/01/1999 - "This study was performed to determine the prevalence in the United States of low 25-hydroxyvitamin D levels among patients with mild primary hyperparathyroidism, and the effect of 25-hydroxyvitamin D status on disease severity. "
08/01/2006 - "Primary hyperparathyroidism (PHPT) is associated with reduced plasma 25-hydroxyvitamin D (P-25OHD) and usually increased plasma 1alpha,25-dihydroxyvitamin D (P-1,25(OH)2D). "
03/01/2014 - "Low 25-hydroxyvitamin D levels are common in patients with primary hyperparathyroidism (PHPT) and associated with higher PTH levels and hungry bone syndrome after parathyroidectomy (PTX). "
12/01/1987 - "2. The elimination half-time of 25-hydroxyvitamin D was significantly shortened in primary hyperparathyroidism and reverted towards normal after parathyroidectomy. "
02/01/2014 - "Association between serum 25-hydroxyvitamin D level and subclinical cardiovascular disease in primary hyperparathyroidism."

05/01/2010 - "Our study showed that immobilization-induced hypercalcemia and 25-hydroxyvitamin D deficiency contribute to reduced bone mineral density (BMD). "
01/01/2013 - "A high 25-hydroxyvitamin D concentration was recorded in 20% of the children, but none had associated hypercalcemia. "
02/01/2011 - "Nine patients presented with hypercalcemia (range, 10.8-17.2 mg/dl; normal, 8.4-9.8 mg/dl), suppressed PTH (range, <3 to 11 pg/ml), and elevated 25-hydroxyvitamin D (range, 94-525 ng/ml; normal, 30-80 ng/ml) levels. "
12/01/1986 - "Animals infused with 1,25-(OH)2D3 exhibited mild hypercalcemia (11.2 vs. 10.2 mg/dl in controls), a 136% increase in the serum concentration of 1,25-(OH)2D3 (187 vs. 79 pg/ml), and a 59% decrease in serum 25-hydroxyvitamin D (12 vs. 29 ng/ml). "
05/01/1981 - "The blood levels of 25-hydroxyvitamin D (25OHD3) were elevated during the hypercalcemia and decreased to normal when the patient became normocalcemic. "