Clinical trials: Vitamin D Deficiency, completed
Vitamin D Deficiency
Vitamin D Intervention Trial in Healthy Chinese, Phase II
This is a double-blind, randomized, placebo-controlled trial. Based on inclusion and exclusion criteria, 400 eligible volunteers, who were 20-45 years, with 25-hydroxyvitamin D between 12.5-50 nmol/L and BMI between 18.5-28…
- Trial name
- NCT01998763
- Testing
- Vitamin D3
- Where
- China
- Volunteers
- 448 people, healthy volunteers welcome
- Sponsor
- Chinese Academy of Sciences
Chronic Lymphocytic Leukemia, Non-Hodgkin Lymphoma
Cholecalciferol in Newly Diagnosed Non-Hodgkin Lymphoma or Chronic Lymphocytic Leukemia With Vitamin D Deficiency
This randomized pilot early phase I trial studies how well cholecalciferol works in treating patients with newly diagnosed non-Hodgkin lymphoma or chronic lymphocytic leukemia with low levels of vitamin D (vitamin D deficiency).
- Conditions
- Chronic Lymphocytic Leukemia, Non-Hodgkin Lymphoma, Untreated Chronic Lymphocytic Leukemia, Vitamin D Deficiency
- Trial name
- NCT02553447
- Testing
- Cholecalciferol, Laboratory Biomarker Analysis
- Where
- United States
- Volunteers
- 197 people
- Sponsor
- University of Nebraska
Infertility, Infertility, Female
The Effect of Vitamin D on Fertility
Objective: To examine the effect of vitamin D supplements on the pregnancy and clinical pregnancy rate in embryo transfer cycles. Design: Experimental study with a pre- and post-test.
- Conditions
- Infertility, Infertility, Female, Vitamin D Deficiency, Vitamin D3 Deficiency
- Trial name
- NCT03890458
- Testing
- DEVIT-3
- Where
- Turkey (Türkiye)
- Volunteers
- 118 people, healthy volunteers welcome
- Sponsor
- Akdeniz University
Hypovitaminosis D
Vitamin D Supplementation in Younger Women
That on average it will require a vitamin D dose of 1700IU/day to increase the serum 25hydroxyvitamin D level from 20 to 30ng/ml in young Caucasian women and a dose of 1860 to 2480 IU/day in African American
- Trial name
- VITADAS (NCT00662844)
- Testing
- vitamin D3
- Volunteers
- 198 people, healthy volunteers welcome
- Sponsor
- Creighton University
Vitamin D Deficiency, Stem Cell Transplant Complications
A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT
Research has suggested that children with sufficient vitamin D levels undergoing hematopoietic stem cell transplant (HSCT) have improved outcomes, including lower incidences of infection and graft-versus-host disease (GVHD), as…
- Conditions
- Vitamin D Deficiency, Stem Cell Transplant Complications, Pediatric Cancer, Blood Disorder
- Trial name
- NCT03176849
- Testing
- Vitamin D3, Standard Vitamin D3 Supplementation
- Where
- United States
- Volunteers
- 49 people
- Sponsor
- Phoenix Children's Hospital
Systemic Lupus Erythematosus, SLE
Vitamin D3 in Systemic Lupus Erythematosus
The purpose of this study is to explore the impact of vitamin D3 on the expression of alpha interferon (IFN alpha) expression in systemic lupus erythematosus (SLE) patients with vitamin D deficiency.
- Conditions
- Systemic Lupus Erythematosus, SLE, Lupus
- Trial name
- NCT00710021
- Testing
- Vitamin D3
- Where
- 8 sites in United States
- Volunteers
- 57 people
- Sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
Nutritional Status, Nutrient Deficiency
Dietary Challenges in the Population of Nursing Homes' Residents
To obtain up-to-date data on nutritional status of older adults, a national dietary survey will be conducted in 2022/2023, providing data on the consumption of foods and enabling the assessment intakes of energy and specific…
- Conditions
- Nutritional Status, Nutrient Deficiency, Micronutrient Deficiency, Vitamin D Deficiency
- Trial name
- NUTRICARE (NCT05389618)
- Testing
- Diagnostic Tests
- Where
- Slovenia
- Volunteers
- 387 people
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)
Vitamin D Deficiency, Critical Illness
Prevalence of Deficiency of Vitamin D in Critically Ill Patients
Vitamin D has been shown to related to clinical outcomes in critically ill patients. The object of this study is to investigate the prevalence of Vitamin D deficiency in critically ill patients with various length of ICU stay .
- Trial name
- NCT03639584
- Where
- Taiwan
- Volunteers
- 662 people
- Sponsor
- National Taiwan University Hospital
Hypophosphatasia
Extension Study of Protocol ENB-002-08 - Study of Asfotase Alfa in Infants and Young Children With Hypophosphatasia (HPP)
This clinical trial studied the long term safety and efficacy of asfotase alfa in infants and young children with infantile onset HPP who completed study ENB-002-08 (NCT00744042).
- Trial name
- NCT01205152
- Testing
- asfotase alfa
- Where
- 8 sites in United States, United Arab Emirates and 1 more
- Volunteers
- 10 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
Coronavirus Disease 2019 (COVID-19)
Increased Risk of Severe Coronavirus Disease 2019 in Patients With Vitamin D Deficiency
In this prospective observational study we aim to study the association of vitamin D deficiency with adverse clinical outcomes in patients infected with Coronavirus disease 2019
- Trial name
- COVIT-D (NCT04403932)
- Where
- Spain
- Volunteers
- 300 people
- Sponsor
- Hospital San Carlos, Madrid
Asthma-COPD Overlap Syndrome, Vitamin D Deficiency
Impact of Vitamin D3 Administration on Cardiac Autonomic Tone in Asthma Chronic Obstructive Pulmonary Disease(COPD) Overlap Patients
Title:Impact of vitamin D administration on cardiac autonomic tone in Asthma Chronic Obstructive Pulmonary Disease (COPD) Overlap patients: A blinded randomized control trial.
- Conditions
- Asthma-COPD Overlap Syndrome, Vitamin D Deficiency, Cardiac Autonomic Tone
- Trial name
- COPD (NCT03773809)
- Testing
- Vitamin D capsule
- Where
- Bangladesh
- Volunteers
- 50 people
- Sponsor
- Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
Vitamin D Deficiency, Critical Illness
Effects of Enteral Supplement Vitamin D Incritically Ill Patients
At present, there is no clinical reference data on how much the concentration of calcifediol in the blood increases after supplementing with vitamin D for Taiwanese ICU patients.
- Trial name
- NCT04292873
- Testing
- Vitamin D supplement
- Where
- Taiwan
- Volunteers
- 61 people
- Sponsor
- National Taiwan University Hospital
Depression, Chronic Liver Disease
Vitamin D Improves Depression in Liver Patients
This study evaluates the efficacy of vitamin D replacement therapy in reducing depressive symptoms in patients with chronic liver disease and vitamin D deficiency.
- Trial name
- CLDVitD (NCT02359266)
- Testing
- Vitamin D
- Where
- Germany
- Volunteers
- 111 people
- Sponsor
- Universität des Saarlandes
Vitamin D Deficiency
Vitamin D Enriched Meat Project (Acute Study)
The importance of achieving an adequate vitamin D status is widely recognised, with public health and research communities heightening their interest over recent years.
- Trial name
- NCT04207294
- Testing
- Pork arm, Chicken arm
- Where
- United Kingdom
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- University of Ulster
Polycystic Ovary Syndrome, Vitamin D Deficiency/Insufficiency
The Effect of Calcium and Vitamin D Supplements on Metabolic and Hormonal Disturbances in Polycystic Ovary Syndrome Patients
The aim of this study is to investigate the safety and metabolic-hormonal efficiency of supplementation vitamin D deficient/insufficient PCOS women with (calcium +vitamin D + metformin) for 8 weeks compared to (placebo+…
- Trial name
- NCT03792984
- Testing
- Vitamin D3, Calcium Carbonate, Metformin
- Where
- 2 sites in Syria
- Volunteers
- 40 people
- Sponsor
- Damascus University
Asthma, Vitamin D Deficiency
Vitamin D Deficiency and Asthma Exacerbation
The study aim is in two phases. First phase: to evaluate the influence of vitamin D deficiency on asthma severity, degree of airway obstruction and frequency of asthma exacerbations.
- Conditions
- Asthma, Vitamin D Deficiency, Disease Exacerbation
- Trial name
- AVD (NCT02661191)
- Testing
- oral cholecalciferol
- Volunteers
- 119 people
- Sponsor
- University of Turin, Italy
Vitamin D Deficiency, Orthostatic Intolerance
Vitamin D Deficiency and Dysautonomia
In previous work the investigator identified a group of children between the ages of 10-18 years whose diagnostic workup for chronic nausea unexplained by conventional diagnostic tests has unexpectedly revealed underlying…
- Conditions
- Vitamin D Deficiency, Orthostatic Intolerance, Nausea
- Trial name
- NCT03032328
- Testing
- vitamin D supplement
- Where
- United States
- Volunteers
- 31 people, healthy volunteers welcome
- Sponsor
- Wake Forest University Health Sciences
Chronic Kidney Disease, Vitamin D Deficiency
Vitamin D, Chronic Kidney Disease (CKD) and the Microcirculation
Overall research aims: This study will examine the effect of vitamin D supplementation on the function of the endothelium and microcirculation of patients with chronic kidney disease and vitamin D deficiency.
- Trial name
- NCT00882401
- Testing
- Ergocalciferol (Vitamin D)
- Where
- United Kingdom
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Barts & The London NHS Trust
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Vitamin D Deficiency
Nutrition and Body Composition in Acute Lymphoblastic Leukemia
Many adolescents with acute lymphoblastic leukemia (ALL) have been found to have low bone density by the end of treatment. This can lead to long-term suffering in survivors due to poor bone health.
- Trial name
- NCT01317940
- Testing
- Vitamin D and Calcium Citrate
- Where
- United States
- Volunteers
- 76 people, healthy volunteers welcome
- Sponsor
- Children's Hospital Los Angeles
Secondary Hyperparathyroidism, Chronic Kidney Disease Mineral and Bone Disorder
Impact of Parathyroidectomy on Cardiovascular Calcification in Dialysis-dependent Patients
This is a prospective cohort study aimed to evaluate change of cardiovascular calcification after parathyroidectomy in patients with end-stage renal disease on dialysis compared with control group on conservative treatment.
- Conditions
- Secondary Hyperparathyroidism, Chronic Kidney Disease Mineral and Bone Disorder, Vascular Calcification, Dialysis
- Trial name
- NCT03937349
- Where
- Russia
- Volunteers
- 63 people
- Sponsor
- Saint Petersburg State University, Russia