Using Reminder Letters to Improve Adherence to Routine Hemoglobin A1C Testing in Adults with Diabetes

Area of Science:

• Internal Medicine
• Endocrinology
• Quality Improvement in Healthcare

Background:

• The American Diabetes Association (ADA) recommends specific hemoglobin A1C (A1C) targets for diabetes management.
• Routine A1C testing every 3 months is crucial for assessing glycemic control and guiding treatment adjustments.
• Patient adherence to recommended A1C testing schedules remains a significant challenge in diabetes care.

Purpose of the Study:

• To evaluate the effectiveness of mailed reminder letters in improving adherence to routine A1C testing.
• To assess the impact of this quality improvement intervention on patients with A1C levels of 8% or higher.
• To identify specific patient groups that may benefit most from reminder letter interventions.

Main Methods:

• A clinic-wide quality improvement pilot project was conducted.
• Mailed reminder letters were sent to 68 patients with A1C levels of 8% or higher who were not adhering to 3-month testing intervals.
• The primary outcome measured was the improvement in A1C testing adherence rates among previously non-adherent patients.

Main Results:

• An overall 58% increase in A1C testing adherence was observed.
• Testing rates among women increased by 103%.
• While not statistically significant at P = .05, improvements in adherence among women approached significance at P = .10.

Conclusions:

• Mailed reminder letters show potential as a tool to enhance patient adherence to regular A1C testing.
• The intervention demonstrated a notable positive impact, especially for female patients.
• Further research with larger patient cohorts is recommended to validate these findings and inform diabetes management strategies.