The mean [ standard deviation ( SD ) ] fat mass ( FM ) and median [ interquartile range ( IQR ) ] FM % measured with SF-BIA were 32.7 ( 6.7 ) kg and 36.3 ( 30.3-39 .3 ) % , respectively , compared with 38.2 ( 8.7 ) kg and 40.9 ( 35.5-45 .6 ) % , respectively , using BIS .