Posted Apr 10 , 2017 04:32 PM

A Comprehensive Evaluation of a Novel Color Range Indicator in Multiple Blood Glucose Meters Demonstrates Improved Glucose Range Interpretation and Awareness in Subjects With Type 1 and Type 2 Diabetes

Grady M, et al. Journal of Diabetes Science and Technology 2016;10:1324-1332

What were the findings (Excerpted from the Abstract)?

The authors had previously demonstrated that people with type 2 diabetes (T2DM) can improve their ability to categorize blood glucose (BG) results into low, in range, or high glycemic ranges after experiencing a color range indicator (CRI or ColorSure™ Technology) in a single meter. This study examined whether a CRI was effective in people with type 1 (T1DM) or T2DM when used in 3 glucose meters. The study involved a total of 179 subjects (139 T2DM and 40 T1DM) who classified BG values as low, in range, or high based on individual current knowledge. Subjects then experienced the CRI which showed whether different BG values were low, in range, or high. After CRI interaction, subjects repeated the classification. Following interaction with the CRI, subjects significantly improved their ability to categorize BG results into low, in range, and high glycemic ranges by 27.9% (T2DM) and 27.2% (T1DM). Improvement was not accompanied by an increase in time spent categorizing results. There was no difference in classification ability between subjects with T1DM or T2DM. There was also no correlation between HbA1c, numeracy level, test frequency, or duration of diabetes and the ability to correctly classify results. Subjects agreed the CRI feature helped them easily interpret glucose values and improved their awareness of glucose ranges.

Why is this important?

Studies have suggested that there are significant issues with health literacy and numeracy in people with diabetes (Fagerlin A, et al. Medical Decision Making 2007;27:672) although the studies have been variable and often use different tests of literacy and numeracy. One study has suggested that numeracy issues may or may not be a problem as it relates to glucose control in people with T1DM and T2DM (Zaugg SD, et al. Clin Diabetes. 2014 Oct;32:152) but clearly more work needs to be done to understand the best measures of those two concepts, as well as segmenting the issues related to their impact on different aspects of diabetes care. Using different techniques to enhance patient comprehension of ‘the numbers’ associated with their diabetes management is one way of potentially improving outcomes. CRI, used in this study, improved the ability of subjects with T1DM and T2DM to interpret and categorize BG values into recommended glycemic ranges. Do you evaluate literacy and numeracy in your patients? What tests do you use?

Read the abstract: