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Factors Associated With Decline In Child Kidney Function Identified

Date:
March 18, 2009
Source:
American Society of Nephrology
Summary:
Characteristics associated with proteinuria -- a predictor of decline in child kidney function -- have been identified, according to a new study. The findings indicate that the level of kidney impairment, the cause of kidney disease, and race are linked to proteinuria -- the presence of protein in the urine.

Characteristics associated with proteinuria—a predictor of decline in child kidney function—have been identified, according to a new study. The findings indicate that the level of kidney impairment, the cause of kidney disease, and race are linked to proteinuria—the presence of protein in the urine.

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The results provide new information regarding the importance of proteinuria and the factors associated with its development in the largest group of children with chronic kidney disease (CKD) ever studied.

In children with CKD, proteinuria has not been studied extensively and researchers did not know what factors are linked to its presence. To better understand proteinuria in young kidney disease patients, Craig Wong, MD, MPH (University of New Mexico) and his colleagues studied subjects enrolled in the Chronic Kidney Disease in Children (CKiD) cohort study, a trial designed to investigate the factors influencing the progression of CKD in children.

The researchers studied more than 400 patients who were aged 1 to 16 years and were seen at 43 pediatric nephrology centers across North America. Clinical tests revealed that proteinuria levels were higher in children with low glomerular filtration rates (an indication of low kidney function). Proteinuria also was associated with non-Caucasian race, which suggests that differences in proteinuria might be due to genetic or environmental factors. The investigators also found that proteinuria was associated with glomerular causes of CKD in which damage occurs in the glomeruli (filtering units inside the kidneys). Furthermore, among patients with glomerular causes of CKD, those who took renin-angiotensin system antagonizing drugs had lower levels of proteinuria compared with those who did not take these medications.

The findings from this study—that in children with CKD, proteinuria is associated with:

  1. low glomerular filtration rate,
  2. the underlying glomerular cause of CKD, and
  3. African American race—will be useful for physicians as they strive to prevent kidney disease progression in young patients.

George J. Schwartz, MD (University of Rochester), a co-author of the study, says that "the CKiD study will enable us to directly examine the effect of proteinuria on the progression of CKD in children, because the design of this study specifies three longitudinal measurements of glomerular filtration rate in each subject over five years of follow-up."

The authors report no financial disclosures.


Story Source:

The above story is based on materials provided by American Society of Nephrology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Association of Proteinuria with Race, Cause of Chronic Kidney Disease, and Glomerular Filtration Rate in the Chronic Kidney Disease in Children Study. Clinical Journal of the American Society Nephrology, March 18, 2009 DOI: 10.2215/CJN.01780408

Cite This Page:

American Society of Nephrology. "Factors Associated With Decline In Child Kidney Function Identified." ScienceDaily. ScienceDaily, 18 March 2009. <www.sciencedaily.com/releases/2009/03/090318211230.htm>.
American Society of Nephrology. (2009, March 18). Factors Associated With Decline In Child Kidney Function Identified. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2009/03/090318211230.htm
American Society of Nephrology. "Factors Associated With Decline In Child Kidney Function Identified." ScienceDaily. www.sciencedaily.com/releases/2009/03/090318211230.htm (accessed December 20, 2014).

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