Chemical analysis of a patient’s urine using a reagent strip gave negative protein and negative glucose results. However, using a separate microalbumin reagent strip, the result was positive. Earlier...

Chemical analysis of a patient’s urine using a reagent strip gave negative protein and negative glucose results. However, using a separate microalbumin reagent strip, the result was positive. Earlier in the day, the urine controls gave the expected results with both types of reagent strips.


Is there a discrepancy in the patient’s test results obtained with the two strips?

Should the urine chemistry controls be rerun?

What is the most likely explanation for the results?