Blood glucose estimation in medical labs is widely recommended by medical professionals in
many clinical cases and may present with great opportunity for error that may impact the quality
of test results and can occur at any stage of test processing which may be preanalytic, analytic, or
In this study, twenty three public and private medical laboratories were assigned to measure
glucose level in three standard solutions, labeled as: testA, testB and testC with concentrations of
75mg/dl, 150mg/dl and 250mg/dl, respectively. The standard error in glucose testing for the
different solutions was assessed after receiving the data from the laboratories.
It is observed that gender; years of experience, specialty, and scientific qualification of the
lab technician had no observable effect on error and accuracy in glucose testing.
The results showed an increase in the standard error while increasing the concentration of
standards as follow: 77.52±3.86mg/dl for TestA, 148.61±7.72mg/dl for TestB and
240.74±14.45mg/dl for TestC. It is also demonstrated higher standard error in glucose testing
with glucometers than spectrophotometric method. Using glucometer, the measured
concentrations for TestA, TestB and TestC, were 75.14±11.25mg/dl, 159.29±24.22mg/dl and
237.57±33.18mg/dl respectively. Meanwhile the measure for TestA, TestB and TestC, using
spectrophotometric method, were 78.56±3.0mg/dl, 143.94±4.26mg/dl and 242.13±15.71mg/dl by
respectively. In spite of a percentage of errors, The results concludes the superiority colorimetric
enzymatic over point of care testing (glucometer) but further studies are recommended to assess
error in glucose testing in both methods.