View clinical trials related to Vitamin D Deficiency.
Filter by:The purpose of the research study is to determine whether a single high dose of vitamin D is helpful in reducing critical illness related complications in intensive care patients who are having sever vitamin D deficiency. Vitamin D deficiency is quite common in critically ill patients ranging from 81.5% to 99%. A number of scientific studies have documented a strong correlation between low levels of vit.D and increased rate of adverse outcomes including infection, acute kidney injury and mortality in ICU patients. A recent randomized controlled trial (RCT) has demonstrated a 50% reduction in hospital mortality in severe vit.D deficient patients following a single high dose of cholecalciferol (Vitamin D3). However, the role of Vit.D supplementation to boost up host immune system and eventually reduction of mortality has yet to be determined by large randomized controlled trials in humans. Hence the study aims to run a randomized controlled trial (RCT) in order to study the role of Vitamin D in critically ill patients.
Vitamin D has effects on many tissues, and hypovitaminosis D is frequent. In a French survey conducted among 1587 adults, vitamin D insufficiency (<30ng/ml) has been reported in 80% of subjects, including 43% with moderate deficiency (<20ng/ml) and 5% with severe deficiency (<10ng/ml). Because of the possible consequences of hypovitaminosis D (osteomalacia in adults…), the number of vitamin D determination has increased ten-fold since 2005 in France, reaching 4.5 million € in 2011, and with it the costs for health insurance. However, there is currently no consensus on the strategy for detection, diagnosis and treatment of hypovitaminosis D. We propose to develop a predictive clinical score of hypovitaminosis D based on the accurate assessment of solar exposure, vitamin D intakes and hypovitaminosis D risk factors collected through a self-administered questionnaire.
Introduction: There are many cross-sectional studies in children and adults indicating that low vitamin D levels in asthmatic patients are correlated with poorer asthma control, poorer lung function, decreased response to glucocorticoids and more frequent exacerbations. Moreover, as there is a significant group of asthmatic patients having insufficient control of their disease, despite high doses of inhaled corticosteroids, we have investigated new treatment alternatives, which include vitamin Objective: To determine the efficacy of vitamin D supplementation in asthmatic patients with vitamin D deficiency in degree of asthma control. Materials and methods: A prospective, controlled, randomised, triple-blind study was conducted with a follow-up of 6 months. The patients recruited were over 18 years of age with a medical diagnosis of bronchial asthma and serum 25(OH)D3 levels < 30 ng/ml. Patients were excluded if they had a smoking habit ≥ 10 pack-years, taking vitamin D supplements, kidney disease (creat. > 2 mg/dl), hypercalcaemia (corrected with proteins > 10.5 mg/dl), a repeat episodes of renal colic, any gastrointestinal disease that might interfere with vitamin D absorption, or severe psychosocial problems, or were pregnant or breast-feeding. The randomisation process assigned patients to one of two groups: a group that received vitamin D (in the form of calcifediol (Hidroferol®) in 16,000-IU ampoules taken weekly by the oral route) and another group that received placebo in a presentation with an identical appearance and the same administration regimen. Demographic, clinical, spirometry and laboratory endpoints were collected. The primary endpoint was degree of asthma control as determined by the internationally validated Asthma Control Test (ACT). The secondary endpoints were asthma exacerbations, dose of inhaled corticosteroids and quality of life as measured using the Mini-AQLQ (Asthma Quality of Life Questionnaire).
The primary aim of the current study is to clarify whether serum vitamin D levels [25(OH)D3] have a temporal association with insulin resistance and/or insulin sensitivity in PCOS women versus healthy ones. To achieve this aim, the investigators will conduct a prospective observational study involving obese and lean PCOS women in comparison to obese and lean healthy subjects living in Cairo, Egypt.
Three hundred thirty (330) overweight, pre-hypertensive/controlled hypertensive, African-American participants will be enrolled in a 8 week study to assess the effect of two administrations of Vitamin D3 on Vitamin D serum responsiveness as a function of clinical, biologic and genetic factors. The investigators anticipate that at least 300 participants will complete this study. Written, signed and dated informed consent to participate in the study will be given by the participant or a legally acceptable representative, in accordance with the International Conference on Harmonization (ICH) Good Clinical Practice (GCP) Guideline E6 and applicable regulations, before completing any study-related activities/procedures. The original signed and dated consent will be kept in the subject's research file and a copy given to the subject. A copy will also be placed in their medical record.
The aim of this study is to detect antibodies to vitamin D in the serum at Different Groups of patients and healthy volunteer. A second goal is to find the relation between Vitamin D Antibody and Vitamin D level.
The effect of vitamin D supplementation on genetic, proteomic , and metabolomic profile in adipose tissue will be studied in 50 subjects.
Six-hundred subjects with vitamin D deficiency will be randomized to vitamin D 3000 IU per day versus placebo for 4 months, with effects on cardiovascular risk factors as main endpoint
Fractures in children are common and the incidence is increasing. They are more common in children who have small, narrow and weak bones. Studies have shown that fractures in early childhood are associated with later bone strength. There are several (i) non-modifiable (age, gender, race, genetics) and (ii) modifiable factors such as nutrition (vitamin D & calcium intake) and exercise that can contribute to bone strength. Low calcium is associated with an increased risk of fracture. Vitamin D plays a pivotal role in bone health by increasing the absorption of calcium from the gut. Investigators know from the previous research that there is a reduction in bone strength in children whose mothers had lower vitamin D levels during pregnancy. Bone growth can also be achieved by loading of bone during childhood in the form of regular sport activities such as gymnastics and exercise programmes. Equally it can be achieved by using whole body vibration (WBV). WBV is the application of vibratory stimulus to the body in a synchronous fashion by which the bones are made much stronger reducing the risk of fracture in later life. Thus WBV can be used as a means to assess bone responsiveness to mechanical stimulation. Studies have shown that standing on a vibrating platform for 10 minutes a day can significantly increase the bone mass. Investigators' own research has also shown that healthy boys when made to stand on a vibration platform for 10 minutes daily for 5 days increased the strength and quality of their bones. Thus the role of diet and mechanical loading are of considerable interest in determining their role in bone health and the prevention of fractures. Maternal Vitamin D Osteoporosis Study (MAVIDOS) is a large study conducted recently at 3 different big centres (Sheffield, Southampton and Oxford). Results from this study have shown that giving a higher dose of vitamin D to pregnant women every day from 14 weeks of pregnancy increased the strength of the bones in their infants. In the proposed study Investigators aim to show how vitamin D supplementation during pregnancy affects the response of bone to vibration in children whose mothers participated in the MAVIDOS study in Sheffield. These children will be 4 years of age when they participate in this study. The results of this study will help inform public health policy on vitamin D intake during pregnancy. This will also help the investigators identify a possible risk factor for poor bone health in children.
After obtaining the approval from the IRB of University of Dammam and informed consent from 550 healthy patients, with vitamin D deficiency and vitamin D insufficiency and deficiency were recruited. Age, weight and height will be taken, a detailed history, meticulous clinical examination was performed to rule out any diseases and complete blood picture, serum calcium, phosphorous, alkaline phosphatase, Parathormone and 25 Hydroxy-vitamin D (25OHD) will be done. 25-Hydroxy Vitamin D3 was measured in house by chemiluminescence immunoassay (CLIA) and ≥30ng/mL was taken as normal, 21-29ng/mL as insufficiency and ≤20 ng/mL as deficiency. The participants were divided into two groups of 350 in study arm and 200 in control arm. All participants were instructed not to change their dietary habits and life style till the study was over. The study group of women were instructed to apply to apply Top-D (Proniosomal Delivered- Vitamin D3) 1 gram containing 5000 IU of vitamin D3. The second group used 1 gram of Aloe vera gel. The participants had no knowledge to which group they belong. A second blood sample was taken at the end of 4 months and the data was entered in the data base and analyzed using SPSS Inc version 19.