Method	Situations for use
MDRD study equation for estimating GFR*	Patients with diabetic kidney disease†
	Patients with chronic kidney disease in middle-age (average age: 51 years)†
	Black patients with hypertensive chronic kidney disease†
	Patients with a kidney transplant†
Cockcroft-Gault equation for estimating creatinine clearance*	Older patients (performs better than the MDRD study equation)
24-hour urine collection for creatinine clearance	Pregnant women
	Patients with extremes of age and weight
	Patients with malnutrition
	Patients with skeletal muscle diseases
	Patients with paraplegia or quadriplegia
	Patients with a vegetarian diet and rapidly changing kidney function