Table 1.

The equations used to estimate glomerular filtration rate (eGFR) based on serum creatinine (SCr) levels, age and sex in a study that compared three equations: Modification of Diet in Renal Disease (MDRD) equation, the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation and the full age spectrum (FAS).^6–8

eGFR equation		Equation
MDRD		175 × (SCr)–1.154 × (Age)–0.203 × 0.742 (if female)
CKD-EPI
Female: SCr ≤0.7 mg/dl		144 × (SCr/0.7)−0.329 × 0.993Age
Female: SCr > 0.7 mg/dl		144 × (SCr/0.7)−1.209 × 0.993Age
Male: SCr ≤0.9 mg/dl		141 × (SCr/0.9)−0.411 × 0.993Age
Male: SCr > 0.9 mg/dl		141 × (SCr/0.9)−1.209 × 0.993Age
FAS
Female: 18 ≤age ≤40 years	Q = 0.70 mg/dl	107.3/(SCr/Q)
Female: age > 40 years		[107.3/(SCr/Q)]*0.988(age–40)
Male: 18 ≤age ≤40 years	Q = 0.90 mg/dl	107.3/(SCr/Q)
Male: age > 40 years		[107.3/(SCr/Q)]*0.988(age–40)