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CompletedNCT01102179Updated Nov 7, 2014

Vitamin D Insufficiency and Deficiency in Chronic Kidney Disease (CKD) Patients in Singapore

An observational study in Stage 2-5 Chronic Kidney Disease and Predialysis, sponsored by National University of Singapore. Completed at 1 site in Singapore. Open to participants aged 21 Years and older. Per ClinicalTrials.gov, last updated 2014-11-07.

Sponsored by National University of Singapore · Observational

Study type
Observational
Time perspective
Cross-sectional
Enrollment
196
Ages
21 Years and older
Sex
All
01

Study summary

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). There is also increasing evidence to show that these abnormalities increase cardiovascular morbidity and mortality in CKD patients. There is a need for early identification of vitamin D insufficiency/deficiency in CKD patients to prevent its long-term complications. However, the vitamin D status of CKD patients in Singapore has not been well described. The purpose of this study is to assess the vitamin D status of predialysis CKD patients in a tertiary academic teaching hospital in Singapore, and its association with parameters for MBD. Predialysis patients from the outpatient renal clinic at the National University Hospital (NUH) will be recruited into this study. Blood samples from the patients will be collected after an overnight fast to determine their serum 25(OH)D, creatinine, phosphorus, calcium, albumin and i-PTH concentrations. These parameters will be compared among patients in various stages of CKD.

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Conditions studied

  • Stage 2-5 Chronic Kidney Disease
  • Predialysis
03

In context

Kidney Diseases

3,840 studies on the registry are indexed under Kidney Diseases; 500 are open to participants now.

This study's enrollment of 196 is close to the median of 192 across 1,033 observational studies indexed under Kidney Diseases.

Browse Kidney Diseases studies →

Lead sponsor

National University of Singapore is the lead sponsor of 206 studies on the registry; 52 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
21 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Patients with stage 2-5 chronic kidney disease who are not on dialysis

Inclusion criteria

  • Male or female 21 years of age or older
  • CKD stage 2 to 5 (who are not on dialysis): CKD stage 2: eGFR 60-89ml/min/1.73m2, stage 3: eGFR 30-59ml/min/1.73m2, stage 4: eGFR 15-29 ml/min/1.73m2, stage 5 eGFR \<15 ml/min/1.73m2)
  • Not receiving over-the-counter or prescription vitamin D therapy
  • On a stable dose of phosphate binder (if any) for at least 1 month prior to the study

Exclusion criteria

Exclusion Criteria:

  • History of liver and chronic inflammatory diseases, primary hyperparathyroidism and malignancies
  • Use of corticosteroids, anticonvulsants or vitamin D compounds
  • Use of an investigational agent within 30 days of study entry
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Study design

Time perspective
Cross-sectional
Enrollment
196 participants (actual)

Groups and cohorts

  • Chronic kidney disease

    All patients with stage 2-5 (pre-dialysis) chronic kidney disease One-time blood draw (10 ml)

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What researchers measure

Primary outcomes

  1. Vitamin D 25(OH)D levels

    Vitamin D levels are only measured at one time point i.e. at baseline

    Time frame: baseline

07

Study locations

1 site
  • National University Hospital
    Singapore, Singapore
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 7, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT01102179
Lead sponsor
National University of Singapore
Collaborators
National Kidney Foundation
First posted
Apr 13, 2010
Start date
Apr 2010
Primary completion
Jul 2014
Completion
Jul 2014
Last update
Nov 7, 2014

Study contacts

Priscilla P How, Pharm.D.
principal investigator · National University of Singapore/National University Hospital

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2014. You cannot join it, but the record below documents what was studied.

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