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Sustained Intensive Treatment and Long-term Effects on HbA1c Reduction (SILVER Study) by CGM in People With Type 1 Diabetes Treated With MDI

Authors: Marcus Lind, Arndís F Ólafsdóttir, Irl B Hirsch, Jan Bolinder, Sofia Dahlqvist, Aldina Pivodic, Jarl Hellman, Magnus Wijkman, Erik Schwarcz, Henrik Albrektsson, Tim Heise, William Polonsky

Abstract

Objective: Continuous glucose monitoring (CGM) reduces HbA1c and time spent in hypoglycemia in people with type 1 diabetes (T1D) treated with multiple daily insulin injections (MDI) when evaluated over shorter time periods. It is unclear to what extent CGM improves and helps to maintain glucose control, treatment satisfaction, diabetes distress, hypoglycemic concerns, and overall well-being over longer periods of time.

Research design and methods: The GOLD trial was a randomized crossover trial performed over 16 months of CGM treatment in people with T1D treated with MDI. People completing the trial (n = 141) were invited to participate in the current SILVER extension study in which 107 patients continued CGM treatment over 1 year along with the support of a diabetes nurse every 3 months.

Results: The primary end point of the change in HbA1c over 1.0-1.5 years of CGM use compared with previous self-monitoring of blood glucose during GOLD showed a decrease in HbA1c of 0.35% (95% CI 0.19-0.50, P < 0.001). Time spent in hypoglycemia <3.0 mmol/L (54 mg/dL) and <4.0 mmol/L (72 mg/dL) decreased from 2.1% to 0.6% (P < 0.001) and from 5.4% to 2.9% (P < 0.001), respectively. Overall well-being (World Health Organization 5-item well-being index, P = 0.009), treatment satisfaction (Diabetes Treatment Satisfaction Questionnaire, P < 0.001), and hypoglycemic confidence (P < 0.001) increased, while hypoglycemic fear (Hypoglycemia Fear Survey-Worry, P = 0.016) decreased and diabetes distress tended to decrease (Problem Areas in Diabetes Scale, P = 0.06). From randomization and screening in GOLD, HbA1c was lowered by 0.45% (P < 0.001) and 0.68% (P < 0.001) after 2.3 and 2.5 years, respectively.

Conclusions: The SILVER study supports beneficial long-term effects from CGM on HbA1c, hypoglycemia, treatment satisfaction, well-being, and hypoglycemic confidence in people with T1D managed with MDI.

Source: https://pubmed.ncbi.nlm.nih.gov/33199470/

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BDI Monthly Events

February 3Virtual Presentation
February 3: Dr. Guzman (BDI’s Director of Clinical Education) will moderate ADA’s “Diabetes 101: Case Management Webinar”.
February 11
February 11Case Consultation
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February 22
February 22T1D Meetup
February 22: Time for another T1D meet-up! GrownupT1Ds, a wonderful nonprofit that organizes fun social events for adults with type 1 diabetes here in southern California and now spreading to other cities across the United States. The next one will be at 1 pm at Hooleys Public House, 5500 Grossmont Center Dr, La Mesa, CA. This event is free, but space is limited. Please RSVP at www.grownupt1ds.org
April 18
April 18CME Workshop
On April 18, BDI will host a live, one-day, CME workshop: Engaging the Disengaged: Innovative Strategies for Promoting Behavior Change in Diabetes. Run by Dr. Polonsky (BDI President) and Dr. Guzman (BDI Clinic Director), Participants will deepen their skills in recognizing and addressing common barriers to effective self-care and cardiometabolic medication initiation and maintenance, while fostering respectful, stigma-free clinical encounters.