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Longitudinal relations between obesity and hypertension following pediatric renal transplantation

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Abstract

Obesity and hypertension frequently complicate renal transplantation (RTxp). The objective was to assess relations among obesity, hypertension, and glucocorticoids in pediatric RTxp recipients. A retrospective cohort study was carried out in 141 RTxp recipients, 2–21 years of age, with ≥12 months of follow-up. Body mass index Z-score (BMI-Z), systolic and diastolic blood pressure Z-scores (SBP-Z and DBP-Z), and medications at 1, 3, 6, and 12 months and annually thereafter were recorded. Quasi-least squares regression analysis was used. The prevalence of obesity (BMI ≥ 95th percentile) increased from 13% at baseline to >30% from 3 months onward. Greater glucocorticoid exposure (mg/kg/day) was associated with greater increases in BMI-Z (p < 0.001). This association was greater in males, younger recipients, and those with lower baseline BMI-Z (all interactions p < 0.02). The prevalence of systolic hypertension (SBP ≥ 95th percentile) was 73% at 1 month and  ≥ 40% at all follow-up visits. Greater glucocorticoid exposure (p < 0.001) and increases in BMI-Z (p = 0.005) were independent determinants of SBP-Z over time. Cyclosporine (versus tacrolimus) was independently associated with greater SBP-Z and DBP-Z (p = 0.001). Sustained obesity and hypertension frequently complicated pediatric RTxp. Obesity was an independent determinant of systolic hypertension. Strategies are needed to prevent obesity and its impact on hypertension, cardiovascular disease, and allograft survival.

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Authors and Affiliations

  1. Division of Nephrology, Department of Pediatrics, The Children’s Hospital of Philadelphia, Main Building, Room 2143, Philadelphia, 19104, PA, USA

    Michelle R. Denburg, Madhura Pradhan, Abigail Jones, Jo Ann Palmer, H. Jorge Baluarte & Mary B. Leonard

  2. Department of Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA

    Justine Shults & Mary B. Leonard

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  1. Michelle R. Denburg
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  2. Madhura Pradhan
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  4. Abigail Jones
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  6. H. Jorge Baluarte
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Correspondence to Michelle R. Denburg.

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Denburg, M.R., Pradhan, M., Shults, J. et al. Longitudinal relations between obesity and hypertension following pediatric renal transplantation. Pediatr Nephrol 25, 2129–2139 (2010). https://doi.org/10.1007/s00467-010-1572-4

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  • DOI: https://doi.org/10.1007/s00467-010-1572-4

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