Table 4 Correlation between each parameter (girls, N = 152).

		Height		% fat		% muscle		Grip strength		OSI		BAP		NTX
		r	p	R	p	r	p	r	p	r	p	r	p	r	p
10/11-year-olds	Height			0.207	0.005	0.885	0.000	0.659	0.000	0.405	0.000
	% fat	0.207	0.005			0.463	0.000	0.130	0.055	0.188	0.010
	% muscle	0.885	0.000	0.463	0.000			0.672	0.000	0.525	0.000
	Grip strength	0.659	0.000	0.130	0.055	0.672	0.000			0.356	0.000
	OSI	0.405	0.000	0.188	0.010	0.525	0.000	0.356	0.000
14/15-year-olds	Height			− 0.095	0.242	0.781	0.000	0.532	0.000	0.154	0.058	− 0.075	0.359	0.093	0.255
	% fat	− 0.095	0.242			0.210	0.009	0.071	0.385	0.157	0.054	− 0.178	0.028	− 0.202	0.013
	% muscle	0.781	0.000	0.210	0.009			0.619	0.000	0.374	0.000	− 0.097	0.236	− 0.094	0.250
	Grip strength	0.532	0.000	0.071	0.385	0.619	0.000			0.242	0.003	− 0.137	0.093	− 0.061	0.455
	OSI	0.154	0.058	0.157	0.054	0.374	0.000	0.242	0.003			− 0.067	0.411	− 0.189	0.020
	BAP	− 0.075	0.359	− 0.178	0.028	− 0.097	0.236	− 0.137	0.093	− 0.067	0.411			0.376	0.000
	NTX	0.093	0.255	− 0.202	0.013	− 0.094	0.250	− 0.061	0.455	− 0.189	0.020	0.376	0.000

Partial correlation coefficient.
The 10/11-year-olds were fifth-grade elementary school students, whereas the 14/15-year-olds were third-year junior high school students.
N, Number of participants; r, partial correlation coefficient; p, probability value; % fat, body fat ratio; % muscle, body muscle ratio; OSI, Osteo-sono assessment index; BAP, bone specific alkaline phosphatase; NTX, type I collagen cross-linked N-telopeptide.

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