A good Glomerular Filtration Rate (GFR) number for an adult is generally considered to be more than 90.
The Glomerular Filtration Rate (GFR) is a crucial measure of how well your kidneys are functioning. It estimates how much blood your kidneys filter each minute. Understanding your GFR can help you monitor kidney health and take appropriate steps if needed.
Understanding GFR Numbers
GFR is measured in milliliters per minute per 1.73 m² (mL/min/1.73 m²). A higher GFR indicates better kidney function. Here's a breakdown:
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Normal Range: According to the reference, in adults, a normal eGFR (estimated GFR) is usually more than 90. This indicates healthy kidney function.
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Age-Related Decline: The reference also notes that eGFR naturally declines with age, even in individuals without kidney disease. So, what is considered "good" can vary somewhat depending on your age.
GFR Stages of Chronic Kidney Disease
The GFR can also indicate the different stages of chronic kidney disease (CKD). A healthcare provider will use your GFR along with other factors to diagnose and classify CKD:
| Stage | GFR (mL/min/1.73 m²) | Description |
|---|---|---|
| 1 | 90 or higher | Kidney damage with normal or increased GFR. |
| 2 | 60-89 | Kidney damage with mild decrease in GFR. |
| 3a | 45-59 | Moderate decrease in GFR. |
| 3b | 30-44 | Moderate decrease in GFR. |
| 4 | 15-29 | Severe decrease in GFR. |
| 5 | Less than 15 | Kidney failure requiring dialysis or transplantation. |
Factors Affecting GFR
Several factors can influence GFR:
- Age: As noted earlier, GFR declines with age.
- Medications: Some medicines can affect kidney function.
- Medical Conditions: Diseases such as diabetes and high blood pressure can impact GFR.
- Dehydration: Being dehydrated can temporarily lower your GFR.
Key Takeaways
- A good GFR number for adults is typically above 90.
- GFR values can be used to diagnose stages of chronic kidney disease.
- Age and certain health conditions can affect GFR.
- Consult with a healthcare provider to interpret your GFR results accurately.
