Abstract:
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Background: DEXA scan is the gold standard for measuring body fat percentage (BF%) and defining body weight status. However it is expensive, time consuming, and exposes the subjects to X-ray. For individuals with Spina Bifida there are a varying number of alternatives depending on the degree of impairment. Assessing which is the best is challenging when there is missing data. Method: Analyses were done on 15 children (4-18 years old), only six of which successfully finished all the procedures. Bland-Altman (BA) plots and concordance correlations were used to evaluate different BMI and BF% calculations, BodPod and BIA based on 4 different height measures, and Skinfold measurements . A linear regression and stepwise backward selection were used to determine which best determined body weight status . A regression tree analysis was used to identify variables to be included in the model. Results: No definitive results could be found. Conclusion: Defining the best in a setting where there are non random missing data is problematic.
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