1Cockcroft-Gault : GFR =	(140 - age) x weight (kg) PCr x 72	x 0.85 (for women)
2 Modification of Diet in Renal Disease (MDRD) : GFR =	170 x PCr - 0.999 x Age - 0.176 x BUN - 0.170 x Albumin0.318 x 0.762 (for women) x 1.180 (for blacks)

Levey, AS, et al. A More Accurate Method To Estimate Glomerular Filtration Equation from Serum Creatinine: A New Prediction Equation. Annals of Internal Medicine. 130 (6): 461-470. March 16, 1999.