. Author manuscript; available in PMC: 2008 Apr 15.

Published in final edited form as: Diabetes Technol Ther. 2003;5(5):791–800. doi: 10.1089/152091503322526996

Table 5.

Precision for Comparison of Two GW2Bs in Simultaneous Use

	All Pairs	Duration-Concordant Pairs^*	Duration-Discordant Pairs^*
# of paired data points	2,815	873	1,942
Absolute difference median mg/dL^† (25^th, 75^th percentiles)	21 (10, 38)	18 (8, 34)	22 (10, 40)
Relative absolute difference ^‡ median (25^th, 75^th percentiles)	15% (7%, 26%)	11% (5%, 21%)	16% (8%, 29%)
Values within 10% percentage	36%	46%	32%
Values within 15% percentage	51%	62%	47%
Values within 20% percentage	64%	74%	59%
Pearson Correlation	0.85	0.89	0.83

Concordant Pair means that the glucose value from each GW2B was from the same sensor period and Discordant Pair means that they were from different periods. Sensor time periods were defined as 0–<6.0 hrs, 6.0–<10.0 hrs, ≥10.0 hrs.

^†

Absolute Difference is the absolute value of the difference.

^‡

Relative Absolute Difference is the absolute value of the relative difference (expressed as percentage).