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Published online January 30, 2008
Diabetes Care 31:927-929, 2008
DOI: 10.2337/dc07-1863
© 2008 by the American Diabetes Association
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Epidemiology/Health Services Research
Original Research

A1C in Children and Adolescents With Diabetes in Relation to Certain Clinical Parameters

The Swedish Childhood Diabetes Registry SWEDIABKIDS

Lena Hanberger, MSC1, Ulf Samuelsson, MD1, Bengt Lindblad, MD2 and Johnny Ludvigsson, MD1

1 Faculty of Health Sciences, Linköping University, Linköping, Sweden
2 Sahlgrenska Academy, Göteborg University, Göteborg, Sweden

Corresponding author: Lena Hanberger, Division of Pediatrics, Faculty of Health Sciences, S-581 85 Linköping, Sweden. E-mail: lena.hanberger{at}lio.se

OBJECTIVE—We explored the relationship between A1C and insulin regimen, duration of diabetes, age, sex, and BMI as well as the differences between clinical mean A1C levels at pediatric diabetes clinics in Sweden.

RESEARCH DESIGN AND METHODS—Data from 18,651 clinical outpatient visits (1,033 girls and 1,147 boys) at 20 pediatric clinics during 2001 and 2002 registered in the Swedish Childhood Diabetes Registry SWEDIABKIDS, a national quality registry, were analyzed.

RESULTS—A1C was <7.0% (target value ~8% per Diabetes Control and Complications Trial/National Glycohemoglobin Standardization Program standards) at 35% of the visits. Girls had significantly higher mean A1C than boys during adolescence. High mean A1C was correlated with high mean insulin dose, long duration of diabetes, and older age. Mean A1C varied between clinics (6.8–8.2%). Differences between centers could not be explained by differences in diabetes duration, age, BMI, or insulin dose.

CONCLUSIONS—Adolescents with a high insulin dose and a long duration of diabetes, especially girls, need to be focused on. Differences in mean values between centers remained inexplicable and require further investigation.


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Copyright © 2008 by the American Diabetes Association.