Table 1.

Measured GFR using inulin in healthy adult males according to age (29)

Age, Yrs	Insulin Clearance, mean±SD, ml/min per 1.73m2
20–29	123±16
30–39	115±11
40–49	121±23
50–59	99±15
60–69	96±26
70–79	89±20
80–89	65±20