Clinical trials: Vitamin D Deficiency, completed
Scoliosis Idiopathic, Vitamin D Deficiency
Vitamin D Levels in Adolescent Idiopathic Scoliosis
This study aims to estimate the prevalence of vitamin D insufficiency among patients with adolescent idiopathic scoliosis, to calculate the differences in serum vitamin D levels, Cobb angles, spinal bone mass densities, and serum…
- Conditions
- Scoliosis Idiopathic, Vitamin D Deficiency, BMD
- Trial name
- NCT03820895
- Testing
- Blood test
- Volunteers
- 60 people
- Sponsor
- Security Forces Hospital
Bone Diseases, Osteomalacia
Study of the Diagnostic Value of Stable Calcium Isotope Profiling in Bone and Calcium Disorders
The purpose of this study is to determine whether mass spectrometry analysis of stable (non-radioactive) calcium isotopes in plasma or urine samples can help in the diagnosis of bone and calcium disorders.
- Conditions
- Bone Diseases, Osteomalacia, Osteoporosis
- Trial name
- eCaSIS (NCT02252679)
- Where
- 2 sites in Belgium, Germany
- Volunteers
- 54 people, healthy volunteers welcome
- Sponsor
- Universitaire Ziekenhuizen KU Leuven
Vitamin D Deficiency, Obesity
Vitamin D Deficiency and Low Bone Mineral Content in Children
The Vitamin D study is designed to investigate the effect of body fat mass on vitamin D levels in children. Earlier studies have shown that individuals with increased fat mass may have low vitamin D levels.
- Trial name
- VDS (NCT00756899)
- Where
- United States
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- University of Massachusetts, Worcester
Dry Eye Syndromes, Hypovitaminosis D
Impact of Vitamin D3 Supplementation in Non-Sjogren Dry Eye Patients With Low Serum Vitamin D Level
Dry eye disease is multifactorial, ocular inflammatory condition causing irritation, stinging sensation, uneasiness and blurring. Non-Sjogren syndrome occurs due to absent or dysfunction of lacrimal gland.
- Trial name
- NCT05425914
- Testing
- Vitamin D, Artificial tear
- Where
- Pakistan
- Volunteers
- 108 people
- Sponsor
- University of Faisalabad
Hypophosphatemic Rickets, X-Linked Dominant
Effect of Cinacalcet on Parathyroid Hormone Secretion in Children and Adolescents With Hypophosphatemic Rickets
This study will measure the effect of cinacalcet (Sensipar) on parathyroid hormone (PTH) secretion in children and adolescents with hypophosphatemic rickets (XLH).
- Trial name
- NCT00195936
- Testing
- Cinacalcet
- Where
- United States
- Volunteers
- 8 people
- Sponsor
- Children's Mercy Hospital Kansas City
Vitamin D Deficiency, Vitamin D Insufficiency
Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin D
This is a feasibility interventional study seeking to determine the safety and efficacy of the Solius Photobiologic System in increasing the serum levels of 25(OH)D in a vitamin D deficient/insufficient adult population.
- Trial name
- NCT04865432
- Testing
- UVB treatment
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Boston University
Vitamin D Deficiency
Vitamin D Status and Immune Function
The purpose of this study is to examine the relationship between Vitamin D status and immunity.
- Trial name
- NCT02416895
- Testing
- In vivo immunity model
- Where
- United Kingdom
- Volunteers
- 264 people, healthy volunteers welcome
- Sponsor
- Bangor University
Vitamin D Deficiency, Obesity
D-tecting Disease - From Exposure to Vitamin D During Critical Periods of Life
Vitamin D deficiency is common among otherwise healthy pregnant women and may have consequences for them as well as the early development and long-term health of their children.
- Conditions
- Vitamin D Deficiency, Obesity, Diabetes Mellitus, Pre-Eclampsia
- Trial name
- D-tect (NCT03330301)
- Testing
- D-tect
- Where
- Denmark
- Volunteers
- 222,776 people
- Sponsor
- Bispebjerg Hospital
Pregnancy, Vitamin D Deficiency
Trial of Vitamin D Supplements to Raise Calcidiol Levels of Pregnant Women in Mongolia
A double-blind randomized, placebo-controlled trial comparing the impact of 600 IU, 2000 IU, or 4000 IU of Vitamin D3 on third trimester 25(OH)D levels and change from baseline.
- Trial name
- NCT02395081
- Testing
- 600 IU Vitamin D3 in prenatal vitamin, 2000 IU Vitamin D3 in prenatal vitamin, 4000 IU Vitamin D3 in prenatal vitamin
- Where
- Mongolia
- Volunteers
- 360 people, healthy volunteers welcome
- Sponsor
- Brigham and Women's Hospital
Primary Immune Deficiency Disorder
Study of Vitamin D3 Substitution to Patients With Primary Immunodeficiency
Hypothesis: Cholecalciferol (vitamin D3) prevent respiratory tract infections in patients with primary immunodeficiency.
- Trial name
- VITAPID (NCT01131858)
- Testing
- Vigantol
- Where
- Sweden
- Volunteers
- 140 people
- Sponsor
- Karolinska University Hospital
Vitamin D Deficiency, Preterm Infants
Vitamin D Supplementation for Extremely Preterm Infants
The study hypothesis states that giving early enteral Vitamin D supplementation to preterm infants will decrease respiratory morbidity in extremely preterm infants.
- Conditions
- Vitamin D Deficiency, Preterm Infants, Bronchopulmonary Dysplasia
- Trial name
- NCT01600430
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 100 people
- Sponsor
- University of Alabama at Birmingham
Vitamin D Deficiency, Vitamin D3 Deficiency
PREDIN: Pregnancy and Vitamin D Intervention Study
Vitamin D deficiency is common among certain risk groups in Sweden, and occurs approximately in every tenth pregnant woman.The aim of the randomized double-blind controlled trial Pregnancy vitamin D intervention (PREDIN) is to…
- Conditions
- Vitamin D Deficiency, Vitamin D3 Deficiency, Pregnancy Complications
- Trial name
- PREDIN (NCT05329428)
- Testing
- Vitamin D Supplementation 20 µg/day, Vitamin D Supplementation 40 µg/day, Usual Antenatal Care
- Where
- Sweden
- Volunteers
- 105 people
- Sponsor
- Göteborg University
Hypophosphatasia (HPP)
Safety Study of Human Recombinant Tissue Non-Specific Alkaline Phosphatase Fusion Protein Asfotase Alfa in Adults With Hypophosphatasia (HPP)
This clinical trial studies the safety, tolerability, and pharmacology of asfotase alfa when given to adults with HPP.
- Trial name
- NCT00739505
- Testing
- Asfotase Alfa
- Where
- 3 sites in United States, Canada
- Volunteers
- 6 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
Hydroxylase Deficiency
Influence of Kidney Performance and Magnesium on Formation of (OH)2-vitamin D3
Retrospective database analysis. The target values are the serum values of 25(OH)D, of 1,25(OH)2D, of magnesium and creatinine as well as age and sex of the patients. The laboratory values of the years 2017 and 2018 are included.
- Trial name
- NCT04237480
- Testing
- serum value 1,25(OH)2 vitamin D
- Volunteers
- 50,000 people, healthy volunteers welcome
- Sponsor
- University Hospital, Basel, Switzerland
Type 2 Diabetes, Nonalcoholic Fatty Liver Disease
Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes
This study is designed to study the effect of vitamin D intake on the severity of fatty liver and poor glucose control in patients with type 2 diabetes and fatty liver disease.
- Conditions
- Type 2 Diabetes, Nonalcoholic Fatty Liver Disease, Vitamin D Deficiency
- Trial name
- VDLS (NCT02132442)
- Where
- United States
- Volunteers
- 12 people
- Sponsor
- University of Massachusetts, Worcester
Down Syndrome, Vitamin D Deficiency
Effect of Exercise Intensity on Vitamin D
Children with Down's syndrome (DS) are more liable to vitamin D deficiency. Treating this deficiency with supplements is associated with the risk of intoxication due to increased intestinal absorption or decreased vitamin D…
- Trial name
- NCT05024110
- Testing
- High intensity treamill exercise training., Moderate intensity treamill exercise training.
- Where
- Saudi Arabia
- Volunteers
- 44 people
- Sponsor
- Taif University
Stage 2-5 Chronic Kidney Disease, Predialysis
Vitamin D Insufficiency and Deficiency in Chronic Kidney Disease (CKD) Patients in Singapore
Vitamin D insufficiency and deficiency is common in chronic kidney disease (CKD) patients and is associated with elevated parathyroid hormone (PTH) concentration and mineral and bone disorder (MBD).
- Trial name
- NCT01102179
- Where
- Singapore
- Volunteers
- 196 people
- Sponsor
- National University of Singapore
Vitamin D Deficiency, Covid19
The Relationship Between Vitamin D Levels, Inflammatory Parameters and Disease Severity of COVID-19 Infection
Vitamin D deficiency increases the susceptibility to respiratory virus infections and the severity of infections. Inflammation plays a key role in pathogenesis in COVID19 while identifying clinical course and prognosis…
- Trial name
- NCT04945577
- Testing
- Inflammatory Parameters, 25 OH Vitamin D Level
- Where
- Turkey (Türkiye)
- Volunteers
- 300 people
- Sponsor
- Fatih Sultan Mehmet Training and Research Hospital
Asthma, Vitamin D Deficiency
Rapid vs Maintenance Vitamin D Supplementation in Deficient Children With Asthma to Prevent Exacerbations.
The role of vitamin D in respiratory health remains uncertain. Whether vitamin D reduces clinically important exacerbations of childhood asthma remains uncertain.
- Trial name
- NCT01395589
- Testing
- Vitamin D
- Where
- Qatar
- Volunteers
- 597 people, healthy volunteers welcome
- Sponsor
- Hamad Medical Corporation
Kidney Transplantation, Vitamin D Deficiency
Vitamin D Replacement After Kidney Transplant
Vitamin D deficiency accelerates vascular risk progression after kidney transplant.
- Trial name
- NCT00748618
- Testing
- Standard vitamin D3 treatment, High dose vitamin D3 treatment
- Where
- United States
- Volunteers
- 116 people
- Sponsor
- University of Nebraska