Daryl J McLeod1,2, Christina B Ching3,4, Yuri V Sebastião5, Jason H Greenberg6, Susan L Furth7, Kirk M McHugh4,8, Brian Becknell4,9. 1. Section of Urology, Nationwide Children's Hospital, Columbus, OH, 43205, USA. Daryl.mcleod@nationwidechildrens.org. 2. Center for Surgical Outcomes Research, Nationwide Children's Hospital, Columbus, OH, 43205, USA. Daryl.mcleod@nationwidechildrens.org. 3. Section of Urology, Nationwide Children's Hospital, Columbus, OH, 43205, USA. 4. Center for Clinical and Translational Research, Nationwide Children's Hospital, Columbus, OH, 43205, USA. 5. Center for Surgical Outcomes Research, Nationwide Children's Hospital, Columbus, OH, 43205, USA. 6. Department of Pediatrics, Section of Nephrology, Yale University School of Medicine, New Haven, CT, 06510, USA. 7. Department of Pediatrics, Division of Nephrology, Perelman School of Medicine at the University of Pennsylvania and the Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA. 8. Department of Biomedical Education & Anatomy, Ohio State University College of Medicine, Columbus, OH, 43210, USA. 9. Department of Pediatrics, Section of Nephrology, Nationwide Children's Hospital, Columbus, OH, 43205, USA.
Abstract
BACKGROUND: Obstructive uropathy (OU) is a common cause of end-stage renal disease (ESRD) in children. Children who escape the newborn period with mild-to-moderate chronic kidney disease (CKD) continue to be at increased risk. The predictive ability of clinically available markers throughout childhood is poorly defined. METHODS: Patients with OU were identified in the Chronic Kidney Disease in Children Study. The primary outcome of interest was renal replacement therapy (RRT) (cases). Controls were age matched and defined as patients within the OU cohort who did not require RRT during study follow-up. RESULTS: In total, 27 cases and 41 age-matched controls were identified. Median age at baseline and age at outcome measurement were 10 vs. 16 years, respectively. First available glomerular filtration rate (GFR) (36.9 vs. 53.5 mL/min per 1.73 m2), urine protein/creatinine (Cr) (0.40 vs. 0.22 mg/mg) and microalbumin/Cr (0.58 vs. 0.03 mg/mg), and serum CO2 (20 vs. 22 mmol/L) and hemoglobin (12.4 vs. 13.2 g/dL) differed significantly between cases and controls, respectively. GFR declined 3.07 mL/min per 1.73 m2/year faster in cases compared to that in controls (p < 0.0001). Urine protein/Cr and microalbumin/Cr increased by 0.16 and 0.11 per year more in cases compared to those in controls, respectively (p ≤ 0.001 for both). Serum phosphate increased by 0.11 mg/dL and serum albumin and hemoglobin decreased by 0.04 (g/dL) and 0.14 (g/dL) per year more for cases compared to those for controls, respectively (p < 0.05 for all). CONCLUSIONS: Age-specific baseline and longitudinal measures of readily available clinical measures predict progression to ESRD in children with mild-to-moderate CKD from OU.
BACKGROUND:Obstructive uropathy (OU) is a common cause of end-stage renal disease (ESRD) in children. Children who escape the newborn period with mild-to-moderate chronic kidney disease (CKD) continue to be at increased risk. The predictive ability of clinically available markers throughout childhood is poorly defined. METHODS:Patients with OU were identified in the Chronic Kidney Disease in Children Study. The primary outcome of interest was renal replacement therapy (RRT) (cases). Controls were age matched and defined as patients within the OU cohort who did not require RRT during study follow-up. RESULTS: In total, 27 cases and 41 age-matched controls were identified. Median age at baseline and age at outcome measurement were 10 vs. 16 years, respectively. First available glomerular filtration rate (GFR) (36.9 vs. 53.5 mL/min per 1.73 m2), urine protein/creatinine (Cr) (0.40 vs. 0.22 mg/mg) and microalbumin/Cr (0.58 vs. 0.03 mg/mg), and serum CO2 (20 vs. 22 mmol/L) and hemoglobin (12.4 vs. 13.2 g/dL) differed significantly between cases and controls, respectively. GFR declined 3.07 mL/min per 1.73 m2/year faster in cases compared to that in controls (p < 0.0001). Urine protein/Cr and microalbumin/Cr increased by 0.16 and 0.11 per year more in cases compared to those in controls, respectively (p ≤ 0.001 for both). Serum phosphate increased by 0.11 mg/dL and serum albumin and hemoglobin decreased by 0.04 (g/dL) and 0.14 (g/dL) per year more for cases compared to those for controls, respectively (p < 0.05 for all). CONCLUSIONS: Age-specific baseline and longitudinal measures of readily available clinical measures predict progression to ESRD in children with mild-to-moderate CKD from OU.
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