Table 4.

Relationship between MDRD GFR and Cockcroft-Gault (CG) creatinine clearance in white and black participants^a

MDRD GFR(ml/min per 1.73 m²)	CG CrCl (ml/min)
	White Participants				Black Participants
	<30	30 to 59	60 to 79	≥80	<30	0 to 59	60 to 79	≥80
^a The number of participants and the percentages that would be classified into the same clearance category by both estimating equations are shown in bold. Numbers and percentages for noncongruent results (i.e., participants who would be categorized differently by the two formulae) are also shown. n represents the actual number of participants in each cell (i.e., unweighted data), whereas percentages are derived from weighted analyses. MDRD GFR estimated according to MDRD Equation 7. CG CrCl Cockcroft-Gault creatinine clearance.
<30
n	31	6			14	1
% within MDRD GFR category	74	26			95	5.1
% within CG CrCl category	23	0.5			37	0.2
30 to 59
n	140	1082	319	112	27	174	29	13
% within MDRD GFR category	4.4	56	27	13	11	69	14	6.7
% within CG CrCl category	74	54	15	2.9	53	35	2.9	0.5
60 to 79
n	11	790	1440	1761	5	237	403	433
% within MDRD GFR category	<0.1	13	35	53	0.4	18	38	44
% within CG CrCl category	2.9	43	67	42	10	49	44	18
≥80
n		56	452	3231		79	477	1928
% within MDRD GFR category		0.9	12	87		2.5	18	80
% within CG CrCl category		2.5	18	56		17	54	82