Table 2.

Characteristics of study patients: summary of continuous variables for all patients*

Variable	Mean	SD	Minimum	Q1	Median	Q3	Maximum
GFR, mL/min	86	32	9	61	85	109	209
Creatinine, mg/dL	0.99	0.28	0.43	0.83	0.95	1.11	4.45
Age, years	57	16	18	45	60	70	91
Weight, kg	76	19	33	63	74	87	200
Height, cm	169	11	137	160	169	177	204
BSA, m2	1.85	0.25	1.17	1.68	1.85	2.02	3.17

*GFR was measured using either ^99mTc-DTPA (Edinburgh and Melbourne) or ⁵¹Cr-EDTA (all others). ⁵¹Cr-EDTA = chromium-51–labeled ethylenediamine tetraacetic acid; GFR = glomerular filtration rate; BSA = body surface area (calculated using DuBois and DuBois); Q1 = 25th percentile; Q3 = 75th percentile; ^99mTc-DTPA = 99mTc-diethylenetriaminepentaacetic acid.