Hi doctor,My father checked his fasting sugar in a blood glucose home monitor using blood taken from pricking the finger and then putting drops of that blood on a test strip. It came out 130 mg/dL. Then, he went to a laboratory and there he gave his blood sample. In laboratory test, the fasting sugar came out to be 108 mg/dL. What is the reason for this difference? The laboratory test was done one hour after the test on home monitor. The same thing has happened many times. Why does home monitor show higher reading than that in the laboratory?
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