Abstract
As dietary therapy for chronic kidney disease, restrictions of phosphorus (P), potassium (K), and protein are necessary, depending on the disease progression. Since dialysis patients have been getting older, it may be necessary to propose simple dietary therapy that can be continued. Generally, rice with reduced P and K contents for treatment is proposed in nutritional education, but many patients living in rice-growing regions would not spend money on such an expensive therapeutic diet. Thus, we investigated the possibility of reducing P, K, and protein by adjusting the rice-washing conditions. The washout rate of P significantly changed each time until the 5th wash (p<0.05). Significant changes were also noted in the washout rates of K and protein until the 4th wash. The washout rates of P, K, and protein by the 5th wash were 50.3, 46.0, and 5.39%, respectively. Regarding answers to the questionnaire, the frequency of rice washing was 3-4 times and the time to replace water was about 10 seconds for many responders, showing that rice washing is insufficient to reduce P and K. For patients under substantial stress due to various factors, such as food restriction and adjustment of the ingested amount, QOL can be improved by undertaking the removal of P and K and washing rice 5 times.
