Stage 1 (eGFR = 90+)
First Signs of Kidney Damage
Kidneys are functioning well, but signs of initial damage are typically indicated by a protein called albumin³ detected in urine (albuminuria).
We’re dedicated to providing test results that empower earlier detection of CKD, support diagnoses, disease monitoring, and treatment decisions. Together, let’s raise awareness about kidney health risks and enable better patient care.
Every minute, a half cup of blood flows through tiny filters in the kidneys as they remove waste and extra water to make urine, help control blood pressure and provide the right balance of minerals and nutrients in the blood.
When kidneys are damaged—which is commonly caused by diabetes, high blood pressure, heart disease, and/or family history of kidney failure—these important organs gradually lose their ability to function properly. The initial signs and symptoms in the early stages of kidney disease can often progress unnoticed without laboratory testing.
CKD is classified in five stages of kidney damage. A simple laboratory test provides important information about kidney function. One test result is called the estimated glomerular filtration rate (eGFR) 2, a calculation that is used to determine how well the kidneys are filtering waste and help diagnose the stage of kidney disease. An eGFR of 100 or more (depending on a patient’s age) is considered to be about 100 percent of the expected function of healthy kidneys.
Stage 1 (eGFR = 90+)
Kidneys are functioning well, but signs of initial damage are typically indicated by a protein called albumin³ detected in urine (albuminuria).
Mild loss of kidney function is evident and albuminuria or other signs of kidney damage are also present.
Visible signs and symptoms, such as swelling, fatigue, reduced appetite, and other complications can occur in some patients, who must prepare for potential end-stage renal failure and dialysis.
Visible signs and symptoms, such as swelling, fatigue, reduced appetite, and other complications can occur in some patients, who must prepare for potential end-stage renal failure and dialysis.
Dialysis or a kidney transplant is required at this very serious stage
To support detection, diagnosis and management of kidney disease in your patients, we offer several inexpensive and widely available tests. Diagnostic tests assess two key markers: estimated glomerular filtration rate (eGFR) and urine albumin-to-creatinine ratio (uACR). Testing for these two markers can help evaluate patients at risk,4 while expanded tests can offer a more comprehensive assessment of closely related health concerns.
Gain insight into new strategies, tools and available resources available to help you manage patients at risk for CKD and potential associated cardiovascular events.
We are now using a new, race-free equation to calculate the estimated glomerular filtration rate (eGFR), a test used to assess kidney function. This change supports health equity and improves health outcomes.
Patient screening requires serum (preferred) or plasma as well as urine samples; results are typically delivered within one day.
Diabetes is cited as the primary causative factor accounting for increased end-stage kidney disease.5
To encourage physicians to test their patients who have type 1 or 2 diabetes and meet the needs of kidney health evaluation, the National Committee for Quality Assurance (NCQA) introduced a new HEDIS® measure called Kidney Health Evaluation for Patients with Diabetes.
Beyond diabetes and factors associated with age, race/ethnicity, obesity and family history, CKD risk factors can include patients with:
Cardiovascular diseases
Glomerular diseases
Cystic diseases
Tubulointerstitial diseases
Testing Once a Year
Kidney disease is typically asymptomatic in its earliest stages. The American Diabetes Association, the NIH’s National Institute of Diabetes and Digestive and Kidney Diseases and many other endocrinology societies recommend testing patients with diabetes and hypertension at least annually to detect or monitor potential kidney damage.6-7
Currently, less than 50% of people with diabetes receive both tests for eGFR and uACR annually.8 Labcorp has partnered with the National Kidney Foundation to help address this significant gap in care by increasing awareness among health professionals.
Contact a Labcorp representative to learn more about our CKD testing options and sign up for the latest news on testing and treatment options.
Caring for your Patients
Kidney damage is generally irreversible, but early identification and interventions may help slow progression. Treatment of kidney disease often requires identifying the underlying cause to guide treatment. Management may involve controlling common complications associated with kidney disease, such as high blood pressure, anemia or mineral bone disorder, among others.
To assess responses to interventions, it is important to periodically monitor changes in eGFR and uACR with readily available, inexpensive laboratory testing. For patients with compete or near-complete kidney failure, dialysis and kidney transplant are the only options.
CKD describes the gradual loss of function in your kidneys,9 which play an important role in filtering your blood and removing waste products.
If your kidneys are damaged or have reduced function, waste products build up in your body, but the early stages of CKD often have very few symptoms
before irreversible damage occurs in the later stages of CKD.
Fortunately, a simple blood and urine test can help assess the health of your kidneys. The earlier you know, the earlier your doctor can help
manage your disease and monitor your health.
The basics
You have two kidneys that work to filter your blood and remove waste products.
Kidney damage
If your kidneys are damaged or have reduced function, waste products build up in your body.
CKD: silent symptoms
Chronic kidney disease (CKD) can progress silently without many signs or symptoms, causing irreversible damage.
96% of people living with kidney damage or mildly reduced kidney function are not aware they have CKD.⁹
Leading risk factors
Additional risk factors
1 in 3 adults living in the U.S. with diabetes may have chronic kidney disease.¹⁰
Test for kidney health with a blood and urine test
Yearly follow up
Health organizations recommend that you should be screened for CKD at least once a year if you have any risk factors.¹¹
Two simple tests
Blood test: Estimated glomerular filtration rate (eGFR)
Urine test: Urine albumin-to-creatinine ratio (uACR)
Early-stage CKD
In early-stage CKD, your care will focus on understanding the cause, slowing progression and addressing any complications.¹²
Late-stage CKD
In late-stage CKD, your kidneys are at risk of failure, which requires dialysis or a kidney transplant.¹³
If you have been diagnosed with CKD, discuss a plan with your provider. Ask how they can help you:
Health organizations recommend at-risk patients, such as those with diabetes, high blood pressure, and/or who have a family history of kidney disease, should be screened at least annually for CKD.
It is recommended that at-risk patients have both of the following screening tests done:
Talk to your doctor about your CKD risk and ask for uACR and eGFR testing.
Urine albumin-to-creatinine ratio (uACR) is another important measurement that can provide early detection of kidney damage and also help monitor responses to treatments. Albumin is a protein that is normally found in the blood, but if the kidneys are damaged, albumin can leak into the urine. Creatinine is a normal waste product that the kidneys pass into urine.12 A laboratory test of urine measures the amount of albumin and compares it to the amount of creatinine detected to calculate your uACR.
Estimated glomerular filtration rate (eGFR) is a calculation of how well your kidneys are functioning using results from your blood test. eGFR accounts for other factors such as your age and gender to help your doctor understand your risk or stage of kidney disease.
We have recently implemented a new race-free eGFR equation, as recommended by the National Kidney Foundation (NKF) and the America Society of Nephrology.13
This equation may result in higher or lower eGFR values for some patients. See how your eGFR result may have changed with the NKF’s eGFR calculator.
If you have been diagnosed with CKD, there is no cure, but your doctor can help you manage your symptoms, reduce the likelihood of complications and slow or stop the progression of the disease. Controlling your blood pressure is important, as well as exercising and following a kidney-healthy diet. Talk to your doctor about the best ways you can care for your kidneys.
Infographic from the Centers for Disease Control and Prevention (CDC).
Join the first nationwide registry for people at all stages of kidney disease to transform kidney care and research together.
Get information about your kidney health with a few questions.
Compare how your eGFR may have changed due to the new race-free equation.
Learn more about the race-free eGFR equation.