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Diabetes Care, Vol 22, Issue 7 1084-1091, Copyright © 1999 by American Diabetes Association
Improved glycemic control reduces the impact of weight gain on cardiovascular risk factors in type 1 diabetes. The Epidemiology of Diabetes Complications Study
KV Williams, JR Erbey, D Becker and TJ Orchard
Division of Endocrinology and Metabolism, School of Medicine, Children's Hospital of Pittsburgh, Pennsylvania, USA. williamsky@msx.upmc.edu
OBJECTIVE: To assess the prevalence and incidence of being overweight in
type 1 diabetes, to identify factors associated with weight gain and
improved glycemic control, and to examine relationships among weight gain,
glycemic control, and cardiovascular risk factors. RESEARCH DESIGN AND
METHODS: The prevalence and incidence of being overweight in the Pittsburgh
Epidemiology of Diabetes Complications (EDC) cohort (n = 441) were compared
with the general population (National Health and Nutrition Examination
Survey [NHANES]). Factors associated with weight gain and improved glycemic
control were identified, and relationships among weight gain, glycemic
control, and cardiovascular risk factors were examined over a 6.9 +/-
2.2-year period. RESULTS: At baseline, the prevalence of being overweight
(BMI > 27.8 kg/m2 for men and > 27.3 kg/m2 for women) was 10.4 and
11.4%, respectively, and was lower than the age- and sex-specific estimate
for the general population (P < 0.05). The incidence of being overweight
was comparable in men (12.6%) and women (11.8%) and did not differ from the
general population (P = 0.98). Weight gain correlated with improvements in
HbA1c (r = -0.21, P < 0.001). Patients with the highest baseline HbA1c
levels gained the most weight and had the greatest improvement in glycemic
control. A lower baseline BMI was also associated with a greater
improvement in glycemic control. Weight gain favorably influenced the lipid
profile in the setting of improved glycemic control, but adversely
influenced the lipid profile in the absence of improved glycemic control.
Weight change was directly associated with blood pressure change, but the
incidence of hypertension was more strongly influenced by the development
of nephropathy. CONCLUSIONS: The prevalence of being overweight in type 1
diabetes remains lower than that in the general population. Moderate weight
gain did not adversely affect the cardiovascular risk profile in the
setting of improved glycemic control.

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Copyright © 1999 by the American Diabetes Association.
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