Author	Estimation formula	Purpose
MDRD⁴¹	eGFR = 186 × serum creatinine (mg per dL) ^−1.154 × age (years) ^−0.203 × (0.742 if patient is female) × (1.210 if patient is black)	To assess renal function and stage chronic kidney disease⁴⁴
Cockcroft and Gault⁴²	Male: eCrCl = ([140 – age (years)] × ideal body weight [kg]) ÷ (serum creatinine [mg per dL] × 72)	To adjust drug dosing for renal function in adults⁴⁵
Cockcroft and Gault⁴²	Female: male eCrCl × 0.85	To adjust drug dosing for renal function in adults⁴⁵
Schwartz⁴³	eCrCl = (length [cm] × k) ÷ serum creatinine (mg per dL)	To adjust drug dosing for renal function in children
	k = 0.45 (infants one to 52 weeks of age)
	0.55 (children one to 13 years of age)
	0.70 (males 14 to 17 years of age)
	0.55 (females 14 to 17 years of age)