TITLE

High rates of albuminuria but not of low eGFR in Urban Indigenous Australians: the DRUID Study

AUTHOR(S)
Maple-Brown, Louise J.; Cunningham, Joan; Hodge, Allison M.; Weeramanthri, Tarun; Dunbar, Terry; Lawton, Paul D.; Zimmet, Paul Z.; Chadban, Steve J.; Polkinghorne, Kevan R.; Shaw, Jonathan E.; O'Dea, Kerin
PUB. DATE
January 2011
SOURCE
BMC Public Health;2011 Supplement 4, Vol. 11 Issue Suppl 4, p346
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: Indigenous Australians have an incidence of end stage kidney disease 8-10 times higher than non- Indigenous Australians. The majority of research studies concerning Indigenous Australians have been performed in rural or remote regions, whilst the majority of Indigenous Australians actually live in urban settings. We studied prevalence and factors associated with markers of kidney disease in an urban Indigenous Australian cohort, and compared results with those for the general Australian population. Methods: 860 Indigenous adult participants of the Darwin Region Urban Indigenous Diabetes (DRUID) Study were assessed for albuminuria (urine albumin-creatinine ratio=2.5 mg/mmol males, ≥3.5 mg/mmol females) and low eGFR (estimated glomular filtration rate < 60 mls/min/1.73 m²). Associations between risk factors and kidney disease markers were explored. Comparison was made with the AusDiab cohort (n = 8,936 aged 25-64 years), representative of the general Australian adult population. Results: A high prevalence of albuminuria (14.8%) was found in DRUID, whilst prevalence of low eGFR was 2.4%. Older age, higher HbA1c, hypertension, higher C-reactive protein and current smoking were independently associated with albuminuria on multiple regression. Low eGFR was independently associated with older age, hypertension, albuminuria and higher triglycerides. Compared to AusDiab participants, DRUID participants had a 3- fold higher adjusted risk of albuminuria but not of low eGFR. Conclusions: Given the significant excess of ESKD observed in Indigenous versus non-Indigenous Australians, these findings could suggest either: albuminuria may be a better prognostic marker of kidney disease than low eGFR; that eGFR equations may be inaccurate in the Indigenous population; a less marked differential between Indigenous and non-Indigenous Australians for ESKD rates in urban compared to remote regions; or that differences in the pathophysiology of chronic kidney disease exist between Indigenous and non-Indigenous populations.
ACCESSION #
62664904

 

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