151 Body composition measurement methods in preterm infants 7 Results Quality assessment Bias TBW 10 ml Bias extracellular water 40 ml Limits of agreement TBW ±650 ml, i.e poor agreement (mean TBW study population 1760 ml) Limits of agreement extracellular water ±360 ml, i.e. poor agreement (mean extracellular water study population 1025 ml) Level of evidence 2 Strengths & limitations Assessment of agreement with reference method + Assessment of intra- and interobserver variability – Repeated measurements + Coefficients of variance assessed – Sensitivity analysis – Bootstrapping analysis – Cross validation group + External validation – Large study population – Exclusively preterm infants +
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