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Associations of dietary fat with albuminuria and kidney dysfunction.

TitleAssociations of dietary fat with albuminuria and kidney dysfunction.
Publication TypeJournal Article
Year of Publication2010
AuthorsLin, J, Judd, S, Le, A, Ard, J, Newsome, BB, Howard, G, Warnock, DG, McClellan, W
JournalAm J Clin Nutr
Volume92
Issue4
Pagination897-904
Date Published2010 Oct
ISSN1938-3207
KeywordsAdult, African Continental Ancestry Group, Aged, Aged, 80 and over, Albuminuria, Body Height, Body Weight, Cardiovascular Diseases, Cross-Sectional Studies, Dietary Fats, European Continental Ancestry Group, Female, Glomerular Filtration Rate, Humans, Kidney Diseases, Male, Middle Aged, Odds Ratio, Patient Selection, Regression Analysis, United States
Abstract

BACKGROUND: Diet represents a potentially important target for intervention in nephropathy, yet data on this topic are scarce.OBJECTIVES: The objective was to investigate associations between dietary fats and early kidney disease.DESIGN: We examined cross-sectional associations between dietary fats and the presence of high albuminuria (an established independent predictor of kidney function decline, cardiovascular disease, and mortality) or estimated glomerular filtration rate (eGFR) <60 mL ⋅ min(-1) ⋅ 1.73 m(-2) at baseline in 19,256 participants of the REGARDS (Reasons for Geographic and Racial Differences in Stroke) study, an ongoing cohort study in US adults aged ≥45 y at time of enrollment. We used logistic regression to assess associations between quintiles of total fat and subtypes of dietary fat (saturated, monounsaturated, polyunsaturated, and trans fat) and presence of high albuminuria or eGFR <60 mL ⋅ min(-1) ⋅ 1.73 m(-2).RESULTS: After multivariable adjustment, only saturated fat intake was significantly associated with high albuminuria [for quintile 5 compared with quintile 1, odds ratio (OR): 1.33; 95% CI: 1.07, 1.66; P for trend = 0.04]. No significant associations between any type of fat and eGFR <60 mL · min(-1) · 1.73 m(-2) were observed. ORs between the highest quintile of saturated fat and eGFR <60 mL · min(-1) · 1.73 m(-2) varied by race with a borderline significant interaction term (ORs: 1.24 in whites compared with 0.74 in blacks; P for interaction = 0.05) in multivariable-adjusted models, but no other associations were significantly modified by race or diabetes status.CONCLUSION: Higher saturated fat intake is significantly associated with the presence of high albuminuria, but neither total nor other subtypes of dietary fat are associated with high albuminuria or eGFR <60 mL · min(-1) · 1.73 m(-2).

DOI10.3945/ajcn.2010.29479
Alternate JournalAm. J. Clin. Nutr.
PubMed ID20702608
PubMed Central IDPMC2937589
Grant ListK08 DK066246 / DK / NIDDK NIH HHS / United States
R03 DK078551 / DK / NIDDK NIH HHS / United States
U01 NS041588 / NS / NINDS NIH HHS / United States