. Author manuscript; available in PMC: 2015 Oct 15.

Published in final edited form as: Diabetes Care. 2008 Mar 13;31(6):1160–1164. doi: 10.2337/dc07-2401

Table 1.

Numerical accuracy

	Guardian	DexCom	Navigator	Glucoday
Point accuracy: euglycemia (blood glucose = 3.9–10 mmol/l)
MAD (mmol/l)	0.91	1.24	0.89	0.87
MARD	15.2	21.2	15.3	15.6
MedAD (mmol/l)	0.82	1.06	0.85	0.60
MedARD	13.3	18.4	11.8	10.7
ISO: % readings within 20% from reference when reference >4.2 mmol/l	73.2	52.2	72.2	76.9
MAD (mmol/l)	0.55	0.73	0.36	0.47
MARD	16.1	21.5	10.3	17.5
MedAD (mmol/l)	0.42	0.64	0.24	0.40
MedARD	13.8	22.5	7.4	15.6
ISO: % readings within 0.8 mmol/l from reference when reference ≤4.2 mmol/l	76.5	52.9	79.4	83.0
Rate accuracy: descent into hypoglycemia Absolute R-deviation (mmol · l⁻¹ · h⁻¹)	2.9	2.4	2.2	5.8
Rate accuracy: ascent from hypoglycemia Absolute R-deviation (mmol · l⁻¹ · h⁻¹)	3.0	3.3	3.3	9.3

Data are percent unless otherwise indicated.