• In premenopausal and postmenopausal women, serum levels of 25-OHD, phosphorus and calcium were stable across the age span. (who.int)
  • Determination of 25-OH vitamin D serum levels (25-OHD) constitutes the method of choice for evaluating vitamin D deficiency. (screumatologia.cat)
  • Blood serum levels of 25(OH)D, phosphorus, calcium, parathyroid hormone (PTH), and calcitonin were tested using standard lab tests. (biomedcentral.com)
  • A higher level of serum vitamin D is expected in residents of the tropics in relation to inhabitants of non-tropical regions, due to greater sun exposure and increased production of vitamin D. Objective: To analyze serum levels of vitamin D, such as 25-hydroxyvitamin D - 25(OH)D, in Brazilian patients at the predialytic stage with CKD. (moam.info)
  • There has been some debate concerning the optimal range of 25(OH)D. Serum levels of 25(OH) D below 50 nmol/L are associated with an increase in serum parathyroid hormone (PTH) levels [ 9 ] and a decrease in physical performance in older individuals [ 10 ]. (biomedcentral.com)
  • Blood samples were obtained at baseline and at 6 months for parameters of calcium homeostasis, including serum concentrations of 25-hydroxyvitamin D (S-25-OHD) and parathyroid hormone (P-PTH). (omega-research.com)
  • However, there have only been a few studies, with limited number of subjects, investigating the relationship between 25-OHD and parathyroid hormone (PTH) in children. (biomedcentral.com)
  • Results At baseline, the mean S-25-OHD was low, 40 nmol/L in the PO group and 41 nmol/L in the IM group. (omega-research.com)
  • At 6 months the mean S-25-OHD was 82 nmol/L in the PO group (P (omega-research.com)
  • Participants with S-25-OHD >100 nmol/L at 6 months were lighter (51.9 kg vs. 67.5 kg, P = 0.002) and had smaller body mass index than participants with lower S-25-OHD (20.5 kg/m(2) and 24.4 kg/m(2), P = 0.017). (omega-research.com)
  • Many patients are deficient in their body stores of vitamin D, reflected by a serum 25-hydroxy vitamin D level less than 30 nmol/L. If this is the case, patients should be treated for 8-12 weeks with high-dose vitamin D, 50,000 IU/week, for repletion. (medscape.com)
  • Once the 25-OH-D level is greater than 30 nmol/L, 1000 IU/d of vitamin D may be instituted. (medscape.com)
  • It has been suggested that serum 25(OH)D levels above 50 nmol/L are sufficient to sustain bone density and calcium absorption and to prevent osteomalacia [ 11 ]. (biomedcentral.com)
  • We used logistic regression to identify associations between different vitamin D variables (25-hydroxyvitamin D concentration (25-OHD), ambient UVB and genetically-predicted 25-OHD concentrations) and COVID-19 (risk of infection, hospitalisation and death) in 495,780 participants from UK Biobank. (medrxiv.org)
  • Average baseline vitamin D levels were below national standards for adequacy for the entire cohort, with a mean serum 25-OHD concentration of 19.2 ng/mL. (pacifichealth.info)
  • The mean (SD) 25-OHD level was 19.2 (11.7) ng/mL, with 26.2% of participants being VitD deficient and 35.1% insufficient. (fabresearch.org)
  • In the kidney, 25- OHD undergoes 1 alfa hydroxylation to form 1,25 (OH) 2 , the active form of the vitamin, also designated as calcitriol. (biomedcentral.com)
  • executive function: β = -0.04 [SE = 0.02], P = .008) participants were greater than those with adequate status after controlling for age, sex, education, ethnicity, body mass index, season of blood draw, vascular risk, and apolipoprotein E4 genotype. (fabresearch.org)
  • Spine T-score: Pearson correlation coefficient = 0.322, p-value = 0.033, Spine Z-score: Pearson correlation coefficient = 0.328, p-value = 0.030) and serum 25(OH)D. In addition, participants with osteopenia and osteoporosis significantly consume a higher amount of soluble fiber than the normal BMD group. (biomedcentral.com)
  • Only low 25-OHD F levels were concordant. (screumatologia.cat)
  • As expected, mean 25-OHD levels varied by race/ethnicity, with lower levels in African Americans (17.9 ng/mL) and Hispanics (17.2 ng/mL) relative to whites (21.7 ng/mL). (pacifichealth.info)
  • Average 25-OHD levels were lower among those with dementia (16.2 ng/mL) compared with those with MCI (20.0 ng/mL) and normal cognitive function (19.7 ng/mL). (pacifichealth.info)
  • Associations were evaluated between 25-OHD levels (as continuous and categorical [deficient, insufficient, or adequate]) and trajectories of cognitive decline. (fabresearch.org)
  • Serum 25-OHD levels, cognitive function, and associations between 25-OHD levels and trajectories of cognitive decline. (fabresearch.org)
  • While the effect of biochemical factors on fracture risk/odds has been documented, the association/correlation between serum 25(OH)D levels, vitamin D dietary intake, and sun exposure with bone mineral density (BMD) remains controversial. (biomedcentral.com)
  • In conclusion, serum 25(OH)D levels and sun exposure are correlated and associated with BMD. (biomedcentral.com)
  • A retrospective record review of 90,042 children, was performed on serum 25-OHD and for 3525 iPTH levels. (biomedcentral.com)
  • 25-OHD levels decreased with respect to age. (biomedcentral.com)
  • There is also a significant variation in the circulating levels of 25-hydroxyvitamin D3 in nonequatorial regions. (biomedcentral.com)
  • At present, data comparing the quantification methods for measurement of free vitamin D (direct assay [direct 25-OHD F ] and estimated by calculation [calculated 25-OHD F ]), are scarce. (screumatologia.cat)
  • Further studies are necessary to clarify the reference values and the indications for 25-OHD F measurement. (screumatologia.cat)
  • A highly sensitive method for measurement of urinary hyaluronan with a minimum molecular mass of 2,000 Da was developed without using HPLC or radioisotopes. (go.jp)
  • During follow-up, vitamin D-deficient adults declined 0.30 standard deviation (0.06 SD/year) in episodic memory and 0.46 SD (0.08 SD/year) in executive function, whereas those with normal 25-OHD status declined 0.10 SD (0.02 SD/year) in episodic memory and 0.20 SD (0.04 SD/ year) in executive function. (pacifichealth.info)
  • 25-OHD level was measured by radioimmunoassay, and bone metabolic status including bone mineral density and bone turnover markers was also measured. (vitamindwiki.com)
  • Mean serum 25-OHD level was 15.9 ± 7.1 ng/mL (range, 2.5 ~ 36.6). (vitamindwiki.com)
  • Serum level of 25-hydroxyvitamin D (25-OHD) is considered to be the most accurate marker for vitamin D status. (biomedcentral.com)
  • The significant inverse relationship that was found between iPTH and 25-OHD suggests that the inflection point of serum 25-OHD level for maximal suppression of PTH is at 30 ng/ml. (biomedcentral.com)
  • While there are individual-level risk factors (e.g., young maternal age, low body mass index), the impact of environmental exposures is not well understood. (cdc.gov)
  • METHODS: We used the U.S. Environmental Protection Agency's Environmental Quality Index (EQI) as a county-level estimate of cumulative environmental exposures for five domains (air, water, land, sociodemographic, and built) and overall from 2006 to 2010. (cdc.gov)
  • The level of 25-hydroxyvitamin D (25(OH)D) is used to evaluate subjects' vitamin D status. (biomedcentral.com)
  • Upon completion, the wearable, watch-size Cybiocare OHD will warn diabetics when blood glucose drops below a certain critical level. (liquidae.com)
  • Therefore, this study is aimed to determine the relationship between the level of 25-OH-vitD and CVDs incidence and mortality in people without underlying CVD-related conditions. (biomedcentral.com)
  • index for vitamin D status [ 4 ]. (who.int)
  • A growing body of evidence shows that poor vitamin D status has been associated with an increased susceptibility to viral and bacterial respiratory infections. (medrxiv.org)
  • 25-OHD is the primary metabolite and is mainly used to evaluate vitamin D status [ 1 ]. (biomedcentral.com)
  • Assessment of Vitamin D status can be assayed using radioimmunoassays, competetive protein binding assays (CPBA), high pressure liquid chromatography (HPLC), and liquid chromatography-tandem mass spectrometry. (biomedcentral.com)
  • As evidenced by the present study, assessment of serum 25-OHD and bone mineral density are recommended in LSS patients with severe pain, and active treatment combining vitamin D, calcium, or bisphosphonate should be considered according to the status of the bone metabolism. (vitamindwiki.com)
  • Chez les femmes préménopausées et postménopausées, la concentration sérique en 25-OHD, en phosphore et en calcium était stable dans la fourchette d'âge. (who.int)
  • Vitamin D helps in absorption of Calcium by the body. (aroraias.com)
  • As a systemic disease, osteoporosis is characterized by microarchitectural deterioration of bone tissue and low bone mass [ 1 ]. (biomedcentral.com)
  • reported an inverse relation- fasting state to the Endocrine and Metabo- ship between 25-OHD and body mass index lism Research Centre in Nemazi Hospital in (BMI) [ 1 ]. (who.int)
  • Vitamin D functions in the human body through both an endocrine and an autocrine mechanism. (mdpi.com)
  • A few studies have shown that the reduction in 25-OH-vitD is directly associated with an increased risk of stroke and CVDs. (biomedcentral.com)
  • The fact that patients with a healthy weight derived a much greater benefit - a 38% reduced risk for metastatic cancer and death compared to 17% overall - suggests your body weight may play a significant role in whether vitamin D supplementation will provide you with the anticancer benefits you seek. (losethempounds.com)
  • We linked maternal addresses to census tract SES measures and used these measures to calculate the neighborhood deprivation index. (cdc.gov)
  • All of these compartments are increased in volume in obesity, so the lower vitamin D likely reflects a volumetric dilution effect and whole body stores of vitamin D may be adequate … Obese people need higher loading doses of vitamin D to achieve the same serum 25-hydroxyvitamin D as normal weight. (losethempounds.com)
  • Low serum 25-hydroxyvitamin D (25-OHD) was found in 52.9% of the women. (who.int)
  • We found significant inverse associations between COVID-19 infection and 25-OHD in univariable models, but these associations were non-significant after adjustment for confounders. (medrxiv.org)
  • The aim of this study was to analyse the concordance between these two methods of 25-OHD F analysis (direct vs. calculated). (screumatologia.cat)
  • This study shows that the concordance between these two methods of 25-OHD F analysis is low and has a concentration dependent bias. (screumatologia.cat)
  • Serum values of total 25-OHD (25-OHD T ), vitamin D binding protein (DBP) (by R&D Systems ELISA), calculated 25-OHD F (by DBP, albumin and 25-OHD T ) and direct 25-OHD F (by DIAsource ELISA) were analysed in 173 healthy women (aged 35-45years). (screumatologia.cat)
  • Vitamin D3 is then hydroxylated in the liver to 25(OH)D and further hydroxylated in the kidneys to its active form, 1,25 dihydroxyvitamin D (1,25(OH) 2 D) [ 6 ]. (biomedcentral.com)
  • A meta-analysis of 25 studies with 10,099 cases of CVDs was performed. (biomedcentral.com)
  • We analysed the impact of the determination of 25-OHD (total, free and bioavailable) on the evaluation its biologic activity (estimated by serum PTH determination) in healthy young women. (screumatologia.cat)
  • here, we compare 1-year outcomes.Weight, % median body mass index (%mBMI), Eating Disorder Examination Questionnaire (EDE-Q) scores, resumption of menses, and rehospitalizations were examined at 3, 6, and 12 months post-discharge. (stanfordchildrens.org)
  • Greater weight suppression predicted longer time to restore menses and more days of rehospitalization.Individuals with atypical AN regained a smaller proportion of body mass and were more weight suppressed over time. (stanfordchildrens.org)
  • Onsens is proud to introduce the world's first Optical Hypoglycemia Detector (OHD), now in full prototype and testing stage. (liquidae.com)
  • There was no significant correlation between creatinine clear- ance or serum PTH ( r = -0.016, P = 0.66) and 25-OHD ( r = 0.012, P = 0.74). (who.int)
  • A 25 to 85 dBHL hearing loss (mean+/-SD: 57.5+/-25.7 dBHL) across all EHF frequencies and a significant drop in DPOAE amplitudes at frequencies 4 to 8 kHz were detected. (cysticfibrosis.online)
  • It also helps release hormones and enzymes that affect almost every function in the human body. (aroraias.com)
  • 34 women did min D (25-OHD) has been accepted as an not meet these criteria. (who.int)
  • The Cybiocare OHD is designed as a totally non-invasive way to help prevent hypoglycemia among the millions of people with diabetes today. (liquidae.com)