IFCC-HbA1c (mmol/mol) = [DCCT-HbA1c (%)- 2.15] x 10.929
Why change?
After the DCCT, a new standard specific for
HbA1c was prepared by the International
Federation of Clinical Chemistry and
Laboratory Medicine (IFCC). In future,
manufacturers will supply IFCC standardised
values for their calibrators as well as DCCTaligned
values. The units for reporting
HbA1c will also be changed so that HbA1c
reported by laboratories is traceable to the
IFCC reference method. Global comparison
of HbA1c results will therefore be possible.