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. 2010 Jun;5(6):1015-20.
doi: 10.2215/CJN.08841209. Epub 2010 Mar 18.

Sickle cell trait and development of microvascular complications in diabetes mellitus

Anthony J Bleyer  1 , Sri V Reddy, Leon Sujata, Gregory B Russell, Damilola Akinnifesi, Anthony J Bleyer Jr, Donald Hire, Zak Shihabi, Mary Ann Knovich, Pirouz Daeihagh, Jorge Calles, Barry I Freedman
Affiliations

Sickle cell trait and development of microvascular complications in diabetes mellitus

Anthony J Bleyer et al. Clin J Am Soc Nephrol. 2010 Jun.

Abstract

Background and objectives: Many African Americans (AA) have both sickle cell trait (SCT) and diabetes mellitus. The objective of this study was to determine whether individuals with diabetes mellitus and SCT have higher rates of microvascular complications relative to those without SCT.

Design, setting, participants, & measurements: This was a retrospective study comparing albuminuria, estimated GFR (eGFR), and microvascular complications in AA with diabetes on the basis of presence of SCT. The study included 821 outpatients who underwent hemoglobin A1c (HbA1c) testing, and presence of SCT was determined using the HbA1c assay. Medical record review and telephone interviews were performed for AA participants.

Results: Data were obtained on 376 AA patients (110 with SCT, 245 with neither SCT nor hemoglobin C trait, and 21 with hemoglobin C trait) and 445 European Americans. The mean eGFR and urinary protein excretion were similar between the three AA subgroups. Analysis revealed that 36.3% of AA nontrait and 22.7% of AA SCT participants had retinopathy, peripheral vascular disease, or end-stage kidney disease (P = 0.01). After adjustment for diabetes duration, age, insulin use, and gender, differences in the prevalence of microvascular complications were not observed.

Conclusions: SCT does not increase the risk of microvascular complications in AA with diabetes mellitus.

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