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  • Title: Too fat or too thin? Body habitus assessment in children listed for heart transplant and impact on outcome.
    Author: Kaufman BD, Nagle ML, Levine SR, Vijaynathan N, Hanna BD, Paridon S, Ravishankar C, Chrisant MK.
    Journal: J Heart Lung Transplant; 2008 May; 27(5):508-13. PubMed ID: 18442716.
    Abstract:
    BACKGROUND: Body habitus assessment (BHA), be it wasted or obese, is a useful marker of nutritional status and overall medical condition. Wasting and obesity pre-heart transplant adversely affects outcomes in adults. The utility of BHA as a prognostic factor in children post-transplant is unknown. METHODS: Weight and height at listing and standard growth charts were used to determine the ideal body weight (%IBW) and percentiles for body mass index for age (BMI%) and weight-for-length (W:L%). Wasting was defined as <90%IBW and/or <or=5th percentile for BMI% or W:L%. Obesity was defined as >120%IBW and/or >or=95th percentile BMI% or W:L%. Outcomes of cohorts based on these criteria were compared. RESULTS: From June 1990 to December 2006, 180 children, aged 5.81 +/- 6 years, were listed for transplant. Wasting occurred in 66 (37%) and obesity in 22 (12%) children, without differences between diagnoses of cardiomyopathy or congenital heart disease. %IBW was a prognostic factor for survival post-transplant on multivariate analysis: obese patients had a hazard ratio (HR) of 3.82 (95% confidence interval [CI] 1.81 to 8.06) compared with normal BHA (p < 0.001). Wasting had a survival advantage compared with normal BHA (HR 0.51, 95% CI 0.27 to 0.94, p = 0.032). There were no significant differences between cohorts in incidence of infections, first-year rejections or graft vasculopathy. CONCLUSIONS: Abnormal BHA at listing was a prognostic factor for survival post-transplant. Obese children had increased mortality, but wasting did not adversely affect post-transplant survival in our population. Body habitus assessment may risk-stratify children at listing, potentially providing a complex target for intervention.
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