Journal
CLINICAL JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY
Volume 9, Issue 11, Pages 1868-1875Publisher
AMER SOC NEPHROLOGY
DOI: 10.2215/CJN.01080114
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Funding
- National Institute of Neurological Disorders and Stroke [R37-NS29993]
- National Institute on Aging [R01-AG028506]
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Background and objectives Various dietary strategies have been investigated to slow kidney function decline. However, it is unknown whether a Mediterranean diet, which has been associated with improved cardiovascular risk, is associated with change in kidney function. Design, setting, participants, & measurements This study used the Northern Manhattan Study, a prospective, multiethnic, observational cohort of participants who were stroke free at baseline. Data were collected between 1993 and 2008. Serum creatinirte measurements were taken a mean 6.9 years apart. A baseline dietary questionnaire was extrapolated into a previously used 9-point scoring system (MeDi). The primary outcome was incident eGFR<60 ml/min per 1.73 m(2)using the Modification of Diet in Renal Disease formula. A secondary outcome was the upper quartile of annualized eGFR decline (>= 2.5 ml/min per 1.73 m(2) per year). Conditional logistic regression models adjusted for demographics and baseline vascular risk factors. Results Mean baseline age was 64 years, with 59% women and 65% Hispanics (N=900); mean baseline eGFR was 83.1 ml/min per 1.73 m(2). Incident eGFR<60 ml/min per 1.73 m(2) developed in 14%. In adjusted models, every 1-point increase in the MeDi score, indicating increasing adherence to a Mediterranean diet, was associated with decreased odds of incident eGFR<60 ml/min per 1.73 m(2) (odds ratio, 0.83; 95% confidence interval, 0.71 to 0.96) and decreased odds of being in the upper quartile of eGFR decline (odds ratio, 0.88; 95% confidence interval, 0.79 to 0.98). Conclusions A Mediterranean diet was associated with a reduced incidence of eGFR<60 ml/min per 1.73 m(2) and upper quartile of eGFR decline in a multiethnic cohort.
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