Association of Fructosamine Levels with Glycemic Control in Children with Type 1 Diabetes as Determined by Continuous Glucose Monitoring: Results from the CGM TIME Trial.

OBJECTIVES: To determine the correlation between fructosamine, used to assess glycemia when HbA1c is not appropriate, with average blood glucose as measured by continuous glucose monitoring (CGM) in children with type 1 diabetes.

METHODS: 97 blood samples were collected from 70 participants in the CGM TIME Trial. Each eligible participant had 3 weeks of CGM data with at least 60% CGM adherence prior to blood collection. Ordinary least squares linear regression incorporating restricted cubic splines was used to determine association between fructosamine and mean blood glucose.

RESULTS: An association was found between fructosamine levels and mean blood glucose with F-statistic of 9.543 p-value <0.001). Data were used to create formulae and a conversion chart for calculating mean blood glucose from fructosamine levels for clinical use.

CONCLUSIONS: There is a complex relationship between average blood glucose and fructosamine.