TABLE 2.

Precision of body composition outcomes in children

	All ages (n = 153)		Ages 6–9.9 y (n = 49)		Ages 10–13.9 y (n = 53)		Ages 14–16.0 y (n = 51)
	%CV	RMSE	%CV	RMSE	%CV	RMSE	%CV	RMSE
Appendicular LSTM index, kg/m2	1.60	0.09	1.97	0.10	1.42	0.09	1.38	0.10
FMI, kg/m2	1.95	0.08	2.50	0.08	1.40	0.07	1.84	0.07
Total LSTM, kg	0.70	0.21	0.90	0.18	0.65	0.22	0.52	0.23
Total LSTM index, kg/m2	0.70	0.09	0.90	0.11	0.65	0.09	0.52	0.08
Subtotal LSTM, kg	0.80	0.21	1.09	0.19	0.66	0.20	0.59	0.24
Subtotal LSTM index, kg/m2	0.80	0.10	1.09	0.11	0.66	0.09	0.59	0.09
Appendicular LSTM, kg	1.60	0.22	1.97	0.17	1.42	0.22	1.38	0.27
Leg LSTM, kg	1.96	0.22	2.22	0.14	1.79	0.21	1.85	0.28
Total FM, kg	1.95	0.17	2.50	0.14	1.40	0.15	1.84	0.21

%CV, percent coefficient of variation (SD/mean×100); FM, fat mass; FMI, fat mass index; LSTM, lean soft tissue mass; RMSE, root mean square error √(∑squared deviations/n).