Abstract
Context: The incidence of recently defined outcome of chronic kidney disease (CKD) has not
been widely reported in type 1 diabetes.
Objective: To examine the prospective association between baseline glycosylated hemoglobin levels
and the 16-year incidence of CKD and end-stage renal disease (ESRD) in type 1 diabetes.
Design: Prospective cohort study of type 1 diabetes individuals.
Setting: Community based in southwestern Wisconsin.
Participants: 547 younger-onset type 1 diabetes individuals who were free of CKD at baseline (1984-86).
Main Outcome Measures: Development of CKD (defined as estimated glomerular filtration rate<60 ml/min/1.73
m2 or ESRD [history of dialysis or renal transplantation]) over 16-year follow-up period,
among individuals free of CKD at baseline. Alternate outcome was 16-year incident
ESRD.
Results: After 16 years of follow-up, there were 158 cases of CKD and 37 cases of ESRD in
our cohort. The 16-year cumulative incidence of CKD was 31.7 percent. Elevated glycosylated
hemoglobin levels were associated with incident CKD and ESRD in separate models. Multivariable
odds ratio (OR) [95% confidence intervals (CI)] comparing the highest quartile of
glycosylated hemoglobin (11-15.3%) to the lowest quartile (6-8.6%) was 6.44 (3.61-11.51),
p-trend<0.0001 for incident CKD and 21.87 (2.84-168.39), p-trend<0.0001 for ESRD.
Conclusions: Higher baseline glycosylated hemoglobin levels are independently associated with
incident CKD and ESRD, among individuals with type 1 diabetes.
Key words
type 1 diabetes - epidemiology - glycemic control - chronic kidney disease - CKD -
ESRD
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Confl ict of interest: There are no confl icts of interest related to this manuscript.
Correspondence
A. Shankar
Department of Community
Occupational, and Family Medicine
Yong Loo Lin School of Medicine
National University of Singapore
Block MD3
16 Medical Drive
117597 Singapore
Phone: +65/65/16 49 68
Fax: +65/67/79 14 89
Email: ashankar@nus.edu.sg