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Homogeneous Time-resolved Förster Resonance Energy Transfer-based Assay for Detection of Insulin Secretion

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Corrected Fructosamine improves both correlation with HbA_1C and diagnostic performance.

S Rodríguez-Segade¹, J Rodríguez², F Camiña³

¹Department of Biochemistry and Molecular Biology, University of Santiago de Compostela. Santiago de Compostela, Spain; Clinical Biochemistry Laboratory, University Hospital Complex of Santiago de Compostela. Santiago de Compostela, Spain.

Clinical Biochemistry

|October 30, 2016

Summary

Correcting fructosamine measurements for serum protein levels, like albumin or total protein, improves their accuracy in diagnosing diabetes. This adjustment enhances the correlation with HbA1c and improves diabetes detection performance.

Keywords:

Albumin Fructosamine HbA(1C)Total serum protein Type 1 diabetes Type 2 diabetes

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Area of Science:

Clinical Chemistry
Diabetes Diagnostics
Biomarker Analysis

Background:

Fructosamine measurements are increasingly used for diabetes screening and management.
Uncertainty exists regarding the necessity of correcting fructosamine for serum protein variations.

Purpose of the Study:

To investigate the impact of correcting fructosamine measurements for albumin and total protein concentrations.
To compare the diagnostic performance of corrected versus uncorrected fructosamine in detecting diabetes.

Main Methods:

Analysis of 40,938 simultaneous measurements of fructosamine, albumin, total protein, fasting plasma glucose, and HbA1c.
Multivariate linear regression and receiver operating characteristic (ROC) curve analyses were employed.
Comparison of uncorrected fructosamine, albumin-corrected fructosamine (FA_Alb), and TP-corrected fructosamine (FA_TP) for diabetes screening.

Main Results:

Significant correlations were observed between fructosamine and serum proteins (albumin and TP) across the patient sample.
ROC analysis revealed significantly greater areas under the curve for FA_Alb (0.905) and FA_TP (0.895) compared to uncorrected fructosamine (0.878).
Correction for protein levels slightly improved the correlation between fructosamine and HbA1c.

Conclusions:

Fructosamine concentration shows a significant correlation with albumin and total protein levels.
Correcting fructosamine measurements for protein concentrations enhances its correlation with HbA1c.
Protein correction of fructosamine improves its performance in detecting diabetes.