Marked Increases in CGM Use Has Not Prevented Increases in HbA1c Levels in Participants in the T1D Exchange (T1DX) Clinic Network

In this report, we examined and compared changes in diabetes technology use and HbA1c levels from data collected in 22,470 participants in the T1DX clinic registry (mean age 26±18 years, duration 14±13 years) between 2016 and 2017 with registry data collected from 25,529 participants (mean age 22±17 years, duration 10±12 years) between 2010 and 2012. There was a moderate increase in insulin pump use across all age groups from 57% in the 2010-12 cohort to 63% in the 2016-17 cohort. In contrast, continuous glucose monitoring (CGM) use rose sharply from 7% to 28%, with the most dramatic increase in the preadolescent and young child groups (4% to 35% for participants