Real-Time Continuous Glucose Monitoring Among Participants in the T1D Exchange Clinic Registry Diabetes Care 2014;37:2702–2709 | DOI: 10.2337/dc14-0303 OBJECTIVE

To assess the frequency of continuous glucose monitoring (CGM) device use, factors associated with its use, and the relationship of CGMwith diabetes outcomes (HbA1c, severe hypoglycemia [SH], and diabetic ketoacidosis [DKA]). RESEARCH DESIGN AND METHODS Survey questions related to CGM device use 1 year after enrollment in the T1D Exchange clinic registry were completed by 17,317 participants. Participants were defined as CGM users if they indicated using real-time CGM during the prior 30 days. RESULTS Nine percent of participants used CGM (6 % of children <13 years old, 4 % of adoles-cents 13 to <18 years, 6 % of young adults 18 to <26 years, and 21 % of adults ‡26 years). CGM use was more likely with higher education, higher household income, private health insurance, longer duration of diabetes, and use of insulin pump (P < 0.01 all factors). CGMusewas associatedwith lowerHbA1c in children (8.3 % vs. 8.6%, P < 0.001) and adults (7.7 % vs. 7.9%, P < 0.001). In adults, more frequent use of CG