Table 2.

CrCl/iGFR ratio by categories of iGFR or CrCl (Mayo Clinic cohort subgroups)

CKD patients (n = 1693)	iGFR category (ml/min/1.73m2)
				≥75 (n = 316)	60–74 (n = 168)	45–59 (n = 275)	30–44 (n = 355)	< 30 (n = 579)	P
	CrCl/iGFR ratio			1.08 (0.97, 1.21)	1.18 (1.06, 1.32)	1.21 (1.09, 1.32)	1.28 (1.14, 1.43)	1.43 (1.26, 1.68)	< 0.001
	CrCl category (ml/min/1.73m2)
				≥75 (n = 453)	60–74 (n = 231)	45–59 (n = 321)	30–44 (n = 377)	< 30 (n = 311)
	CrCl/iGFR ratio			1.18 (1.05, 1.36)	1.22 (1.06, 1.35)	1.23 (1.11, 1.40)	1.33 (1.16, 1.54)	1.34 (1.17, 1.55)	0.005
Kidney transplant recipients (n = 1461)	iGFR category (ml/min/1.73m2)
				≥75 (n = 132)	60–74 (n = 239)	45–59 (n = 430)	30–44 (n = 410)	< 30 (n = 250)
	CrCl/iGFR ratio			1.04 (0.91, 1.19)	1.14 (1.02, 1.29)	1.17 (1.06, 1.33)	1.31 (1.19, 1.46)	1.51 (1.35, 1.77)	< 0.001
	CrCl category (ml/min/1.73m2)
				≥75 (n = 310)	60–74 (n = 341)	45–59 (n = 447)	30–44 (n = 263)	< 30 (n = 100)
	CrCl/iGFR ratio			1.29 (1.12, 1.44)	1.19 (1.05, 1.36)	1.22 (1.06, 1.39)	1.27 (1.10, 1.50)	1.39 (1.18, 1.63)	< 0.001
Post kidney donation subgroup (n = 206)	iGFR category (ml/min/1.73m2)
				≥75 (n = 42)	60–74 (n = 91)	< 60 (n = 73)
	CrCl/iGFR ratio			1.06 (0.99, 1.13)	1.04 (0.97, 1.15)	1.14 (1.02, 1.31)			< 0.001
	CrCl category (ml/min/1.73m2)
				≥75 (n = 75)	60–74 (n = 85)	< 60 (n = 46)
	CrCl/iGFR ratio			1.15 (1.06, 1.22)	1.06 (1.00, 1.17)	1.02 (0.91, 1.12)			< 0.001
Potential kidney donors (n = 464)	iGFR category (ml/min/1.73m2)
		≥110 (n = 123)	90–109 (n = 175)	< 90 (n = 166)
	CrCl/iGFR ratio	0.98 (0.89, 1.07)	1.06 (0.97, 1.13)	1.09 (1.00, 1.19)					< 0.001
	CrCl category (ml/min/1.73m2)
		≥110 (n = 159)	90–109 (n = 170)	< 90 (n = 135)
	CrCl/iGFR ratio	1.10 (1.01, 1.20)	1.04 (0.96, 1.13)	0.99 (0.87, 1.08)					< 0.001

All the data are expressed as median (IQR)