Beliefs Around Hypoglycemia and Their Impacts on Hypoglycemia Outcomes in Individuals with Type 1 Diabetes and High Risks for Hypoglycemia Despite Using Advanced Diabetes Technologies

<i>Objective:</i> This study aims to: (1) identify the frequency of severe and level 2 hypoglycemia presenting in people with type 1 diabetes using continuous glucose monitoring systems (CGMs), including those with concomitant closed-loop insulin pumps, in a clinical practice setting; (2) evaluate the impact of beliefs around hypoglycemia in the development of severe and level 2 hypoglycemia in this population. <p><i>Research Design and Methods:</i> A cross-sectional survey study in adults with type 1 diabetes using CGMs >6 months was conducted at a large tertiary academic center. Participant demographics, 6-month severe hypoglycemia history, hypoglycemia beliefs (with the Attitude to Awareness of Hypoglycemia questionnaire) and 4-week CGM glucose data were collected. Statistical analysis was performed to assess the presentation of severe and level 2 hypoglycemia and identify associated risk factors. </p> <p><i>Results: </i>A total of 289 participants were recruited (including 257 participants with CGM data within the last 3 months). Of these, 25.6% experienced at least one severe hypoglycemic episode in the last 6 months, and 13.6% presented with ≥1% of time in level 2 hypoglycemia on CGMs. Reporting beliefs about prioritizing hyperglycemia avoidance was associated with severe hypoglycemia development (<i>P</i><0.001), while having beliefs of minimal concerns for hypoglycemia was associated with spending ≥1% of time in level 2 hypoglycemia (<i>P</i>=0.038).</p> <p><i>Conclusions:</i> Despite the use of advanced diabetes technologies, severe and level 2 hypoglycemia continues to occur in people with type 1 diabetes and high hypoglycemia risks. Human factors, including beliefs around hypoglycemia, may remain to impact the effectiveness of glucose self-management.</p>