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Which kidney test works best for sickle cell patients? study aims to find out

NCT ID NCT03958643

Knowledge-focused Sponsor: National Heart, Lung, and Blood Institute (NHLBI) Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jul 15, 2026 · Updated 2 times

Summary

This study looked at 70 adults with sickle cell disease to see which lab test—cystatin C or creatinine—better measures kidney function. Participants gave blood and urine samples and had a special dye test to check how well their kidneys work. The goal is to help doctors catch kidney problems early in people with sickle cell disease.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

70 people

The number who actually took part.

Started

May 2019

Finished

Feb 2022

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

The study will be open to all eligible subjects based on inclusion and exclusion criteria and who provide informed consent. No patient will be excluded from participation based on gender, race, or ethnicity. Patients may self-refer, be recruited through the NIH office of recruitment, and may include patients participating on NIH Clinical Center Protocols, and NIH employees.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: Known diagnosis of Sickle Cell Anemia (Hb SS or HbS-beta0-thal) \>=18 years of age Willingness and capacity to provide written informed consent EXCLUSION CRITERIA: Pregnancy Uncontrolled/poorly controlled hypertension Diabetes Dialysis GFR \<30 ml/min/1.73m2 HIV positive HepatitisC Hepatitis B Prior transplantation Uncontrolled infection or acute illness Chronic inflammatory disease (e.g. lupus, multiple sclerosis, rheumatoid arthritis) Allergy to iodine or iodinated contrast solutions Hydroxyurea initiation or dose adjustment \<2mo prior Initiation of chronic transfusion therapy \<2mo prior Antihypertensive medication initiation or dose adjustment \<1mo prior Pain crisis in preceding 4weeks

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Conditions

The condition(s) this trial relates to.

sickle cell disease

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Sickle cell disease

Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    Bethesda, Maryland, 20892, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.