Table 1.

Accuracy of Common Monitoring Systems in the United States

System	Percentage meeting standard (above 75 mg/dl; absolute value in parenthesis below 75 mg/dl)
	20% (15 mg/dl)	15% (12 mg/dl)	10% (8 mg/dl)	5% (4 mg/dl)
A	99	91	68	35
B	96	91	82	52
C	99	95	84	53
D	100	98	88	52
E	99	98	92	63
F	98	97	89	61
G	98	95	79	41
H	99	98	92	65
I	99	98	93	71