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【Diabetes Care】将糖化血红蛋白的数值转化成平均
http://care.diabetesjournals.org/cgi/content/full/31/8/1473
OBJECTIVE—The A1C assay, expressed as the percent of hemoglobin that is glycated, measures chronic glycemia and is widely used to judge the adequacy of diabetes treatment and adjust therapy. Day-to-day management is guided by self-monitoring of capillary glucose concentrations (milligrams per deciliter or millimoles per liter). We sought to define the mathematical relationship between A1C and average glucose (AG) levels and determine whether A1C could be expressed and reported as AG in the same units as used in self-monitoring.
RESEARCH DESIGN AND METHODS—A total of 507 subjects, including 268 patients with type 1 diabetes, 159 with type 2 diabetes, and 80 nondiabetic subjects from 10 international centers, was included in the analyses. A1C levels obtained at the end of 3 months and measured in a central laboratory were compared with the AG levels during the previous 3 months. AG was calculated by combining weighted results from at least 2 days of continuous glucose monitoring performed four times, with seven-point daily self-monitoring of capillary (fingerstick) glucose performed at least 3 days per week.
RESULTS—Approximately 2,700 glucose values were obtained by each subject during 3 months. Linear regression analysis between the A1C and AG values provided the tightest correlations (AGmg/dl = 28.7 x A1C – 46.7, R2 = 0.84, P < 0.0001), allowing calculation of an estimated average glucose (eAG) for A1C values. The linear regression equations did not differ significantly across subgroups based on age, sex, diabetes type, race/ethnicity, or smoking status.
CONCLUSIONS—A1C levels can be expressed as eAG for most patients with type 1 and type 2 diabetes.
下面是霍顿老爷爷在今年ADA的幻灯，这是首次大样本采用CGMS+7次/日自测血糖来评估，可信度比较好
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screen.width-333)this.width=screen.width-333" width=454 height=341 title="Click to view full Picture 294.jpg (454 X 341)" border=0 align=absmiddle> 幻灯3
screen.width-333)this.width=screen.width-333" width=454 height=341 title="Click to view full Picture 300.jpg (454 X 341)" border=0 align=absmiddle> 幻灯4
screen.width-333)this.width=screen.width-333" width=454 height=341 title="Click to view full Picture 302.jpg (454 X 341)" border=0 align=absmiddle> 幻灯5
screen.width-333)this.width=screen.width-333" width=454 height=341 title="Click to view full Picture 304.jpg (454 X 341)" border=0 align=absmiddle> [标签:content1][标签:content2]
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作者:admin@医学,生命科学 2011-03-24 19:03
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