Relation between IFCC numbers and
the respective national DCMs

The relations can be expressed either
as conversion formulas or as
HbA1c numbers at given clinical conditions.

Conversion factors

National DCM	From IFCC to DCM	From DCM to IFCC
NGSP (USA)	NGSP = 0.09148 IFCC + 2.152	IFCC = 10.93 NGSP - 23.50
JDS/JSCC (Japan)	JDS = 0.09274 IFCC +1 .724	IFCC = 10.78 JDS - 18.59
Mono-S (Sweden)	Mono-S = 0.09890 IFCC + 0.884	IFCC = 10.11 Mono-S - 8.94

Source: Hoelzel W, Weykamp C, Jeppsson JO, Miedema K, Barr JR, Goodall I, Hoshino T, John WG, Kobold U, Little R, Mosca A, Mauri P, Paroni R, Susanto F, Takei I, Thienpont L, Umemoto M, Wiedmeyer HM. IFCC Reference System for Measurement of Hemoglobin A1c in human blood and the national standardization schemes in the United States, Japan and Sweden: a method comparison study. Clin.Chem. 2004; 50: 166-174


Published Clinical Targets and Reference Ranges, expressed
in IFCC and DCM numbers, respectively

Clinical Condition	IFCC	NGSP	JDS/JSCC	Mono-S
Upper level of non-diabetic reference range	43 mmol/mol	6.1 %	5.7 %	5.1 %
ADA target for patients with diabetes	53 mmol/mol	7.0 %	6.6 %	6.1 %