Correlation between plasma and urine glucose in diabetes.

Blood and urine specimens from 135 adult diabetic patients routinely visiting an outpatient diabetic clinic of Siriraj Hospital were collected and assayed for glucose levels. The results of negative, trace 1+, 2+, 3+ and 4+ by Diastix were associated with urinary glucose levels of 25.43, 161.57, 354.50, 776.67, 1598.18 and 4191.25 mg/dl and plasma glucose levels of 154.07, 193.93, 205.10, 216.11, 241.09 and 284.04 mg/dl respectively. Plasma glucose levels from 83-283 mg/dl were negative by Diastix and 100% of urine samples with plasma glucose levels above 300 mg/dl were positive by Diastix.