TABLE I.

Endogenous Creatinine Clearance (Ccr) ^* by Decade of Life in “Normal” Subjects (n=254) (Adapted from Reference (11))

Age Group (Years)	Mean ± SEM Ccr (ml/min)	Slope of Ccr (ml/min/year)
30–39.9	156 ± 5	+0.67 ± 0,4
40–49.9	145 ± 3	−0.32 ± 0.2
50–59,9	136 ± 2	−0.57 ± 0.2
60–69.9	119 ± 3	−1.24 ± 0.3
70–79.9	107 ± 3	−1.49 ± 0.3
80–89.9	94 ± 6	−3.25 ± 0.7
All ages	130 ± 2	−0.75 ± 0.1

* (note: Ccr overestimates true GFR (Cin) by approximately 22%).