This is an application for a K23 award for Dr. Yoshio Hall, an Assistant Professor in nephrology at the University of Washington. Dr. Hall is establishing himself as a young investigator in patient-oriented clinical research of chronic kidney disease (CKD) in medically underserved populations. This K23 award will provide Dr. Hall with training and mentored research experience in the following areas: (1) recruiting and maintaining a patient cohort;(2) performing and validating diagnostic tests;(3) developing and maintaining a CKD registry from multiple data sources;(4) training in health information technology, (5) training in advanced statistical and epidemiologic methods;and (6) designing pilot intervention studies. To achieve these goals, Dr. Hall has assembled a mentoring team comprised of a primary mentor, Dr. Jonathan Himmelfarb, Director of the Kidney Research Institute and Professor of Medicine, who is recognized internationally as a leader in translational and outcomes research in persons with end-stage renal disease (ESRD) and acute kidney injury, and two co-mentors: Dr. Edward Boyko, Acting Head of the Division of General Internal Medicine at the University of Washington and former Director of the VA-funded Epidemiologic Research and Information Center, who is an internationally known investigator in the epidemiology of diabetes and obesity with extensive experience in disease registry development and management;and Dr. Glenn Chertow, Chief of Nephrology and Professor of Medicine at Stanford University, who is internationally recognized as a leader in improving care for persons with acute and chronic kidney disease . Chronic kidney disease (CKD) is an important public health problem which affects more than 26 million Americans. In the US, members of racial-ethnic minority groups and low-income populations bear a disproportionate burden of CKD, particularly ESRD. We hypothesize that the disparate rates of ESRD among these at-risk groups reflect a pattern of underutilization of care. We further hypothesize that public health systems which disproportionately care for diverse populations do not consistently identify or provide recommended care to persons with CKD who are at highest risk for progressive disease. We will test these hypotheses using a series of analyses that leverage data from (1) Harborview Medical Center, the largest public hospital system in the northwestern United States;and (2) The Community Health Network, a large safety net health system in northern California. This research will form the basis for patient-centered interventions to improve the delivery of care to diverse populations. Public health relevance: Improved understanding of local- and system-level barriers to care delivery in historically disadvantaged populations may reduce pervasive racial-ethnic and socioeconomic disparities in care and decrease the growing burden of CKD and ESRD to society.

Public Health Relevance

Chronic kidney disease is defined as the presence of persistent kidney damage and/or loss of kidney function. In the United States, chronic kidney disease affects an estimated 27 million Americans and is associated with substantial morbidity, mortality and cost. In this country, racial-ethnic minority groups and low-income populations bear a disproportionate burden of chronic kidney disease, particularly end-stage renal disease. The central hypotheses of this proposal are that modifiable local- and system-level factors can be identified which influence the delivery of care and impact long-term risk for development and progression of chronic kidney disease to ESRD among disadvantaged populations.

National Institute of Health (NIH)
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Mentored Patient-Oriented Research Career Development Award (K23)
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Special Emphasis Panel (ZDK1)
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Rankin, Tracy L
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University of Washington
Internal Medicine/Medicine
Schools of Medicine
United States
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Xie, Yuxiang; Maziarz, Marlena; Tuot, Delphine S et al. (2016) Risk prediction to inform surveillance of chronic kidney disease in the US Healthcare Safety Net: a cohort study. BMC Nephrol 17:57
Crews, Deidra C; Hall, Yoshio N (2015) Social disadvantage: perpetual origin of kidney disease. Adv Chronic Kidney Dis 22:4-5
Hall, Yoshio N; Xu, Ping; Chertow, Glenn M et al. (2014) Characteristics and performance of minority-serving dialysis facilities. Health Serv Res 49:971-91
Kurella-Tamura, Manjula; Goldstein, Benjamin A; Hall, Yoshio N et al. (2014) State medicaid coverage, ESRD incidence, and access to care. J Am Soc Nephrol 25:1321-9
Wilhelm-Leen, Emilee R; Hall, Yoshio N; Horwitz, Ralph I et al. (2014) Phase angle, frailty and mortality in older adults. J Gen Intern Med 29:147-54
Maziarz, Marlena; Chertow, Glenn M; Himmelfarb, Jonathan et al. (2014) Homelessness and risk of end-stage renal disease. J Health Care Poor Underserved 25:1231-44
Ioannidou, Effie; Hall, Yoshio; Swede, Helen et al. (2013) Periodontitis associated with chronic kidney disease among Mexican Americans. J Public Health Dent 73:112-9
Hall, Yoshio N; Choi, Andy I; Xu, Ping et al. (2013) Predictors of end-stage renal disease in the urban poor. J Health Care Poor Underserved 24:1686-700
Purnell, T S; Xu, P; Leca, N et al. (2013) Racial differences in determinants of live donor kidney transplantation in the United States. Am J Transplant 13:1557-65
Kaysen, George A; Greene, Tom; Larive, Brett et al. (2012) The effect of frequent hemodialysis on nutrition and body composition: frequent Hemodialysis Network Trial. Kidney Int 82:90-9

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