Question:
I realize that urine tests for blood-glucose levels are inaccurate, but is there any rule-of-thumb correlation between actual blood glucose levels and these results on Diastix Reagent Strips for Urinalysis: 100 mg/dL, 250, 500, 1000, 2000+?
Answer:
Yes, there's a correlation but it's crude, since the urine result depends on
the "renal threshold" (the level at which the kidney starts "spilling" sugar
from the filtered blood into the urine) as well as the relative rate of
change of blood sugar (for instance, urine collected by a person with
diabetes long after a big meal might have a large amount of sugar in it
from the meal, even though their blood sugar might have decreased to normal
in the past few hours).
WWQ
Original posting 20 Sep 96