Lohman et al developed an equation for estimating percent body fat from body density in prepubescent pediatric patients. This takes into account the lower bone mineral content and higher water content in these children.

Parameter: body density in g/mL


estimated percent body fat =

= ((5.30 / (body density)) - 4.89) * 100%



• The fat-free body density for a prepubescent child is calculated to be 1.084 g/mL.


body density in g/mL =

= 5.3 / (((percent body fat) / 100%) + 4.89)

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