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
- Health Maintenance, Nutrition, and Metabolism: Clinical
October 22, 2020 | Location: On-Demand
Abstract Time: 10:00 AM - 12:00 PM
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/g | Plant to total protein, % | P, mg/1000Cal | Potassium, mg/1000Cal | |
| Blacks | 11.6±2.0 | 23% | 595±107 | 1,034±249 |
| Hispanics | 13.4±2.6 | 27% | 614±137 | 1,059±235 |
| Whites | 12.9±2.1 | 31% | 600±127 | 1,025±220 |
Funding
- NIDDK Support