Table 4.

Stage of renal function according to method of assessing GFR

	GFR stage	MDRD-4				CKD-EPI
		ml/min/1.73 m2				ml/min/1.73 m2				Creatinine clearance				Cockcroft-Gault
				Omittingcorrectionfor race				Omitting correction for race		ml/min/1.73 m2		ml/min		ml/min/1.73 m2		ml/min
		n	%	n	%	n	%	n	%	n	%	n	%	n	%	n	%
Males	1	269	75.8	139	39.2	280	78.9	189	53.2	123	34.7	99	27.9	38	10.7	34	9.6
	2	80	22.5	195	54.9	68	19.2	151	42.5	179	50.4	183	51.5	244	68.7	201	56.6
n = 355	3	6	1.7	19	5.4	7	2	14	3.9	49	13.8	65	18.3	70	19.7	115	32.4
	4	0	0	2	0.6	0	0	1	0.3	4	1.1	8	2.3	3	0.9	5	1.4
	5	0	0	0	0	0	0	0	0	0	0	0	0	–	–	–	–
Females	1	396	67.2	190	32.3	448	76.1	295	50.1	232	39.4	148	25.1	135	22.9	91	15.5
	2	184	31.2	350	59.4	132	22.4	265	45	285	48.4	278	47.2	329	55.9	259	44
n = 589	3	9	1.5	47	8.0	9	1.5	29	4.9	71	12	157	26.7	122	20.7	230	39
	4	0	0	2	0.3	0	0	0	0	1	0.2	6	1	3	0.5	9	1.5
	5	0	0	0	0	0	0	0	0	–	–	–	–	–	–	–	–
All	1	665	70.4	329	34.8	728	77.1	484	51.3	355	37.6	247	26.2	173	18.3	125	13. 2
	2	264	28	545	57.7	200	21.2	416	44.1	464	49.2	461	48.8	573	60.7	460	48.7
n = 944	3	15	1.6	66	7.0	16	1.7	43	4.6	120	12.7	222	23.5	192	20.3	345	36.6
	4	0	0	4	0.4	0	0	1	0.1	5	0.5	14	1.5	6	0.6	14	1.5
	5	0	0	0	0	0	0	0	0	–	–	–	–	–	–	–	–
All	3–5	15	1.6	70	7.4	16	1.7	44	4.7	125	13.2	236	25.3	198	21.0	359	38.0