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+?
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).
Original posting 20 Sep 96
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