Continuous Glucose Monitoring for In-hospital Management of Type 2 Diabetes

Title: Continuous glucose monitoring vs point of care glucose measurements for in-hospital type 2 diabetes management - STENO In-Hospital CGM Trial - a multisite, randomized controlled trial.

Aim To investigate the effects and feasibility of continuous glucose monitoring (CGM) on in-hospital glycemic and clinical outcomes in hospitalized, non-intensive care unit (non-ICU) patients with type 2 diabetes compared to standard point-of-care (POC) glucose testing.

Population: Non-ICU adults with type 2 diabetes at the participating departments at hospitals in the Capital Region of Denmark.

Design: Investigator-initiated, multi-site, two-armed, prospective, randomized, open-labelled blinded endpoint (PROBE) trial. Participants are randomized 1:1 to either a POC-arm (control) or a CGM-arm (intervention):

* POC-arm (control): Participants in this arm are monitored with standard of care POC-based glucose monitoring and treated with insulin according to national guidelines. Blinded CGM is applied. * CGM-arm (intervention): Participants in this arm are monitored with CGM and treated with support from a CGM-based algorithm for insulin titration.

In the CGM-arm, a diabetes support team assists in insulin titration to ensure the execution of algorithmic decisions according to protocol. In the POC-arm the same diabetes support team will ensure that participants are treated with insulin according to national guidelines.

Objectives: To compare in-hospital glycemic control and clinical outcomes between the POC- and CGM-arm participants.

Outcomes: Time in range (3.9-10.0 mmol/L) and in-hospital complications are the primary outcomes. Additional secondary glycemic outcomes are reported in alignment with the newest consensus on CGM-metrics for in-hospital glucose management. Key secondary clinical outcomes are length of stay, 7-, 30-, 60-, and 90-days mortality and readmission rates after discharge. Tertiary outcomes are net costs of the two methods for handling in-hospital diabetes, and an assessment of potential heterogeneity of treatment effects from CGM compared to POC.

Method: POC glucose measurements are transmitted to the Electronic Medical Record (Sundhedsplatformen). CGM data from the Dexcom G7 is transmitted to a separate web-based platform, Dexcom CLARITY, for retrospective review. Additionally, real-time glucose data from the Dexcom G7 is displayed on tablets/iPhones at diabetes support team stations for ongoing monitoring.

Investigational device: Dexcom G7 CGM (Dexcom Inc., San Diego, USA). Time schedule: Inclusion Q2 2025 to Q4 2026.