A Caucasian man aged 46 years, working as an oil rig area coordinator in remote South Australia, presented with incidental hyperglycaemia.

This paper addresses concordance between glycated haemoglobin and fasting plasma glucose as the two most widely used diagnostic tests for type 2 diabetes.

Glycated haemoglobin (HbA1c) should not be interpreted in isolation; the measurement accuracy and other parameters, including treatment goals and comorbidities, need to be considered.