Table 1.

Conversion Factors to Derive HbA1c and eAG from IFCC and NGSP Units

	Derived from IFCC units, X = HbA1c in IFCC (mmol/mol)	Derived from NGSP units, X = HbA1c in NGSP units (%)
HbA1c	IFCC (mmol/mol) = X	IFCC (mmol/mol) = 10.93X − 23.5
	NGSP (%) = 0.0915X + 2.15	NGSP (%) = X
	JDS (%) = 0.0927X + 1.73	JDS (%) = 1.013X − 0.45
	MonoS (%) = 0.0989X + 0.88	MonoS (%) = 1.081X − 1.44
eAG	eAG (mmol/liter) = 0.146X + 0.93	eAG (mmol/liter) = 1.59X − 2.59
	eAG (mg/dl) = 2.63X + 15.0	eAG (mg/dl) = 28.7X − 46.7