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Abstract: PO2028

Higher Estimation of Dietary Phosphorus Content with More Plant-Based Protein in Hemodialysis Patients Across Race/Ethnicity Using 3-Day Food Records with Interviews

Session Information

Category: Health Maintenance, Nutrition, and Metabolism

  • 1300 Health Maintenance, Nutrition, and Metabolism

Authors

  • Tortorici, Amanda R., University of California Irvine, Orange, California, United States
  • Rhee, Connie, University of California Irvine, Orange, California, United States
  • You, Amy Seung, University of California Irvine, Orange, California, United States
  • Streja, Elani, University of California Irvine, Orange, California, United States
  • Norris, Keith C., University of California Los Angeles David Geffen School of Medicine, Los Angeles, California, United States
  • Kalantar-Zadeh, Kamyar, University of California Irvine, Orange, California, United States
Background

Dietary phosphorus (P) restrictions are commonly recommended based on the estimated phosphorus (P) content of foods, not accounting for P type or its absorbability. Whereas plant-based diets have important benefits, they are traditionally not recommended to dialysis patients given perceived higher P content in plant vs. animal-based proteins, although P is less absorbable in plant foods. We examined dietary differences across race/ethnicity in a group of hemodialysis (HD) patients from several dialysis centers in Southern California.

Methods

The self-administered 3-day diet diary with face-to-face interview was conducted by a trained dietitian among 80 in-center HD patients, and the data were entered into a diet software (Nutrition Data System for Research), and dietary components of the individuals and subgroups were obtained.

Results

Patients were 57±15 years and included 25% Blacks, 36% Hispanics and 18% non-Hispanic Whites. Table shows dietary data across race/ethnicity. [table] Figure shows the association of the phosphorus-to-protein ratio with the percentage of plant protein, correlation coefficient r was 0.58 (p<0.001) for all including 0.28, 0.61 and 0.38 for Blacks, Hispanics and Whites, respectively.[figure]

Conclusion

Whereas estimated dietary potassium was not substantially different across race/ethnicity or different plant- vs. animal based protein proportions, dietary phosphorus content analyses may not account for varying phosphorus bioavailability across sources, which may lead to incorrect assumptions that higher plant-based protein for dialysis patients is associated with more phosphorus burden.

Analyses of 3-day diet diary across race/ethnicity
 P to protein ratio, mg/gPlant to total protein, %P, mg/1000CalPotassium, mg/1000Cal
Blacks11.6±2.023%595±1071,034±249
Hispanics13.4±2.627%614±1371,059±235
Whites12.9±2.131%600±1271,025±220

Funding

  • NIDDK Support