Abstract
Background
In adults with chronic kidney disease (CKD), protein-energy wasting (PEW) is a risk factor for hospitalization and death. However, PEW in children with CKD is not well characterized or defined.
Methods
Using data from the Chronic Kidney Disease in Children study, we assessed three alternate definitions of PEW using biochemical parameters, body and muscle mass measurements, and reported appetite as described in adults: (1) a minimal PEW definition (≥2 of the four criteria); (2) a standard PEW definition (≥3 of the four criteria); (3) a modified PEW definition (≥3 of the four criteria plus a pediatric-focused criterion of short stature or poor growth).
Results
Of the 528 children analyzed in this study (median age 12 years, median glomerular filtration rate 45 mL/min/1.73 m2, 39 % female, 18 % African American), 7–20 % met the spectrum of definitions for PEW. The unadjusted incidence rates for incident hospitalizations were 1.9-, 2.1-, and 2.2-fold higher for those children diagnosed with PEW using the minimal, standard, and modified definitions, respectively (P = 0.08, 0.09 and 0.03). Following adjustment, only the modified PEW definition, which added short stature or poor growth as a criterion, showed modest significance (P = 0.06).
Conclusions
The inclusion of a criterion based on growth may augment the definition of PEW and improve risk discrimination in children with CKD.
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Acknowledgments
The authors would like to acknowledge the efforts of Derek Ng and Rachel Zack in the analysis of the data presented in this manuscript. Data in this manuscript were collected by the Chronic Kidney Disease in children prospective cohort study (CKiD) with clinical coordinating centers (Principal Investigators) at Children’s Mercy Hospital and the University of Missouri–Kansas City (Bradley Warady, MD) and Children’s Hospital of Philadelphia (Susan Furth, MD, Ph.D.), data coordinating center at the Johns Hopkins Bloomberg School of Public Health (Alvaro Muñoz, PhD), and the Central Biochemistry Laboratory at the University of Rochester (George J. Schwartz, MD). The CKiD is funded by the National Institute of Diabetes and Digestive and Kidney Diseases, with additional funding from the Eunice Kennedy Shriver National Institute of Child Health and Human Development, and the National Heart, Lung, and Blood Institute (U01 DK82194, U01-DK-66143, U01-DK-66174, and U01-DK-66116). The CKID website is located at http://www.statepi.jhsph.edu/ckid.
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Abraham, A.G., Mak, R.H., Mitsnefes, M. et al. Protein energy wasting in children with chronic kidney disease. Pediatr Nephrol 29, 1231–1238 (2014). https://doi.org/10.1007/s00467-014-2768-9
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DOI: https://doi.org/10.1007/s00467-014-2768-9