MSRA-0441
A 56-year-old man is evaluated after being diagnosed with hypertension. As part of his assessment, he underwent a series of blood tests to screen for other risk factors:
Na+ 142 mmol/l
K+ 3.9 mmol/l
Urea 6.2 mmol/l
Creatinine 91 µmol/l
Fasting glucose 7.7 mmol/l
Total cholesterol 7.2 mmol/l
Due to the fasting glucose result, you order a HbA1c:
HbA1c 31 mmol/mol (5.0%)
What could account for the discrepancy between the HbA1c and fasting glucose levels?