MDRD-4 — Modification of Diet in Renal Disease GFR

Calculate estimated GFR using the 4-variable MDRD equation (creatinine, age, sex, race) for CKD staging, drug dosing adjustment, and research where MDRD-4 was the original study equation.

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Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate estimated GFR using the 4-variable MDRD equation (creatinine, age, sex, race) for CKD staging, drug dosing adjustment, and research where MDRD-4 was the original study equation

Each component has a specific meaning:

  • 4-variable MDRD equation (creatinine — The 4-variable mdrd equation (creatinine recorded for the scenario being assessed.
  • Age — The age recorded for the scenario being assessed.
  • Sex — The sex recorded for the scenario being assessed.
  • Race) — The race) recorded for the scenario being assessed.

Note: Interpret the mdrd-4 gfr result against the thresholds and context described above.

How to Use

Enter the 4-variable MDRD equation (creatinine, age, sex, race) for the scenario you are assessing. Calculate estimated GFR using the 4-variable MDRD equation (creatinine, age, sex, race) for CKD staging, drug dosing adjustment, and research where MDRD-4 was the original study equation. Use the mdrd-4 gfr result to inform your calculation.

Frequently Asked Questions