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A change of units for HbA1c

Abstract

Worldwide, measurement of glycated haemoglobin (HbA1c) is the mainstay for monitoring long-term glycaemic control in people with diabetes mellitus. However, until recently there was no internationally agreed standard for measuring and reporting HbA1c levels. There is now an international standard for HbA1c, agreed by the International Federation of Clinical Chemistry (IFCC), and from 1 June 2009 all UK laboratories began reporting HbA1c in the new units according to this standard. Here we explain the rationale behind this change.

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