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NCT Number: NCT07312981
The CPH-MBD Cohort Dietary Substudy - Comparison of Methods for Dietary Registrations
The aim of the study is to assess the association between the calcium and phosphorus balance and the stage of kidney disease measured by creatinine clearence in patients with chronic kidney disease stage 4 and 5. The balance is measured a measurement between the recorded diatery intake and the urinary excretion. Additionally a comparison between image based diatery accessment and weighted records will be measured
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Interested in participating?
Request InfoKey information
Conditions
CKD
Avitaminosis
Bone Diseases
Bone Diseases, Metabolic
CKD-MBD - Chronic Kidney Disease Mineral and Bone Disorder
Calcium Metabolism Disorders
Chronic Disease
Chronic Kidney Disease-Mineral and Bone Disorder
Deficiency Diseases
Disease Attributes
Endocrine System Diseases
Female Urogenital Diseases
Female Urogenital Diseases and Pregnancy Complications
Hyperparathyroidism
Hyperparathyroidism, Secondary
Kidney Diseases
Male Urogenital Diseases
Malnutrition
Metabolic Diseases
Musculoskeletal Diseases
Nutrition Disorders
Nutritional and Metabolic Diseases
Parathyroid Diseases
Pathologic Processes
Pathological Conditions, Signs and Symptoms
Pre-dialysis
Renal Insufficiency
Renal Insufficiency Chronic
Renal Insufficiency, Chronic
Rickets
Urogenital Diseases
Urologic Diseases
Vitamin D Deficiency
Age range
18 year and older
Sex eligibility
All sexes
Study type
Observational
Primary location
Copenhagen University Hospital - Herlev, Herlev, Capital Region, Denmark
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About this study
All participants will be asked to take photos of all the food and fluids they consume during 24 hours. Additionally participants will be offered to weight their food and fluid for 3 days.
Who can participate
Healthy volunteers accepted: No
Only the study team can determine whether someone qualifies for participation.
Inclusion criteria
- A glomerular filtration rate of <30 ml ml/min/1.73m2
- 18 years and above
Exclusion criteria
None
Treatment and study plan
Primary outcomes
-
Comparison of diatery photograph method with weighted records.
Time frame: 3 days
The intake of calcium and phosphate assesed by the 24 hour photos and the 72 hour weighing of food and fluid items will be compared.
-
Calcium and phosphate balance in relation to the stage of kidney disease
Time frame: 3 days
Measured by the diatery intake of calcium and phosphate in relation to the urinary calcium and phosphate excretion
Secondary outcomes
-
Urinary Calcium
Time frame: 3 days
mmol/day
-
Urinary phosphate
Time frame: 3 days
mmol/day
-
Calcium intake total and the distribution of vegetarian and animal sources
Time frame: 3 days
mg/day
-
Phosphate intake total and the distribution of vegetarian and animal sources
Time frame: 3 days
mg/day
-
sodium intake total and the distribution of vegetarian and animal sources
Time frame: 3 days
mg/day
-
Energy intake
Time frame: 3 days
Kcal/day
-
Protein intake
Time frame: 3 days
g/day
-
Fat intake
Time frame: 3 days
g/day
-
Fluid intake
Time frame: 3 days
ml/day
-
Plasma phosphate
Time frame: 3 days
mmol/l
-
Plasma calcium
Time frame: 3 days
mmol/l
-
Urinary creatinine
Time frame: 3 days
mmol/day
-
Urinary urea
Time frame: 3 days
mmol/day
-
Urinary sodium
Time frame: 3 days
mmol/day
-
Plasma FGF23
Time frame: 3 days
mmol/l
-
P-calcium P- phosphate product
Time frame: 3 days
Can be calculated by multiplying plasma calcium and plasma phosphate
-
plasma 25-OH-Vitamin D
Time frame: 3 days
nmol/l
-
plasma PTH
Time frame: 3 days
pmol/l
-
Plasma Albumin
Time frame: 3 days
g/dl
-
eGFR
Time frame: 3 days
ml/min/1.73m2
Study contacts
Contact information is provided by the study sponsor or research team.
Jens Rikardt Andersen, MD, MPA
CONTACT
Julian Askøe Bluming, RD
CONTACT
Sponsors and collaborators
Lead sponsor
University of Copenhagen
Other
Collaborators
- Herlev Hospital
Registry information
Official study title
The CPH-MBD Cohort - Substudy on Dietary History
Important dates
- Study start
- 2025
- Primary completion
- 2026
- Study completion
- 2029
- First posted
- Dec 31, 2025
- Registry last updated
- Dec 31, 2025
OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.
View the official ClinicalTrials.gov record (opens in a new tab)This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.
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