Abstract
To assess the relationship between fat free mass (FFM), fat mass (FM), body mass index (BMI) and percentage fat mass (%FM) using Hattori chart in a group of Sri Lankan children. In this cross sectional descriptive study involving 5-15 y old children, data from 4 different school surveys were pooled together. Height and weight were measured and BMI calculated. Total body water (TBW) was assessed using a height and weight based equation. Thus FFM and FM were assessed based on 2 C body composition model. Fat mass index (FMI) and Fat free mass index (FFMI) were calculated and plotted on Hattori chart. 4278 individuals (1297 boys and 2981 girls) were studied. Individual values clearly showed that Sri Lankan children had a low FFMI and a high FMI. Individuals with similar BMI had their %FM distributed in a wide range. Even children categorized as wasted had high levels of %FM in their body. Mean FMI and FFMI for each age was plotted, and it showed that most of the weight gain is due to accumulation of fat in the body. This study shows that Sri Lankan children have a higher %FM from a younger age even when they are classified as wasted. As they grow older, the changes that occur in FM are more than FFM. This chart analysis clearly shows that BMI is not a good index to measure %FM in individuals of this population.
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