. Author manuscript; available in PMC: 2008 Feb 21.

Published in final edited form as: J Pediatr. 2004 Jun;144(6):770–775. doi: 10.1016/j.jpeds.2004.03.042

Table 1.

GW2B and CGMS Accuracy Summary Statistics Overall and According to Time of Day

	Total	11:00 PM – 6:00 AM	6:30 AM – 10:30 PM
GW2B
# of paired data points	487	286	201
Absolute difference^* mg/dL median (25^th, 75^th percentiles)	13 (6, 23)	13 (6, 24)	13 (7, 21)
Values within 10 mg/dL percentage	40%	41%	40%
Values within 20 mg/dL percentage	70%	66%	74%
CGMS
# of paired data points	668	307	361
Absolute difference^* mg/dL median (25^th, 75^th percentiles)	17 (8, 29)	18 (8, 29)	16 (7, 29)
Values within 10 mg/dL percentage	34%	32%	36%
Values within 20 mg/dL percentage	58%	56%	60%

Absolute difference defined as the absolute value of the sensor glucose value minus the reference glucose value (always positive).