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  • Title: Results of a Study Comparing Glycated Albumin to Other Glycemic Indices.
    Author: Desouza CV, Holcomb RG, Rosenstock J, Frias JP, Hsia SH, Klein EJ, Zhou R, Kohzuma T, Fonseca VA.
    Journal: J Clin Endocrinol Metab; 2020 Mar 01; 105(3):677-87. PubMed ID: 31650161.
    Abstract:
    CONTEXT: Intermediate-term glycemic control metrics fulfill a need for measures beyond hemoglobin A1C. OBJECTIVE: Compare glycated albumin (GA), a 14-day blood glucose measure, with other glycemic indices. DESIGN: 24-week prospective study of assay performance. SETTING: 8 US clinics. PARTICIPANTS: Subjects with type 1 (n = 73) and type 2 diabetes (n = 77) undergoing changes to improve glycemic control (n = 98) or with stable diabetes therapy (n = 52). INTERVENTIONS: GA, fructosamine, and A1C measured at prespecified intervals. Mean blood glucose (MBG) calculated using weekly self-monitored blood glucose profiles. MAIN OUTCOME MEASURES: Primary: Pearson correlation between GA and fructosamine. Secondary: magnitude (Spearman correlation) and direction (Kendall correlation) of change of glycemic indices in the first 3 months after a change in diabetes management. RESULTS: GA was more concordant (60.8%) with changes in MBG than fructosamine (55.5%) or A1C (45.5%). Across all subjects and visits, the GA Pearson correlation with fructosamine was 0.920. Pearson correlations with A1C were 0.655 for GA and 0.515 for fructosamine (P < .001) and with MBG were 0.590 and 0.454, respectively (P < .001). At the individual subject level, Pearson correlations with both A1C and MBG were higher for GA than for fructosamine in 56% of subjects; only 4% of subjects had higher fructosamine correlations with A1C and MBG. GA had a higher Pearson correlation with A1C and MBG in 82% and 70% of subjects, respectively. CONCLUSIONS: Compared with fructosamine, GA correlates significantly better with both short-term MBG and long-term A1C and may be more useful than fructosamine in clinical situations requiring monitoring of intermediate-term glycemic control (NCT02489773).
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