Table 3.

Correlation between each parameter (boys, N = 125).

		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			0.287	0.001	0.886	0.000	0.451	0.000	0.075	0.204
	% fat	0.287	0.001			0.485	0.000	0.348	0.000	0.058	0.259
	% muscle	0.886	0.000	0.485	0.000			0.594	0.000	0.080	0.186
	Grip strength	0.451	0.000	0.348	0.000	0.594	0.000			0.060	0.254
	OSI	0.075	0.204	0.058	0.259	0.080	0.186	0.060	0.254
14/15-year-olds	Height			0.060	0.252	0.732	0.000	0.363	0.000	0.148	0.049	− 0.445	0.000	− 0.406	0.000
	% fat	0.060	0.252			0.460	0.000	0.256	0.002	0.274	0.001	− 0.025	0.390	− 0.209	0.010
	% muscle	0.732	0.000	0.460	0.000			0.651	0.000	0.429	0.000	− 0.122	0.088	− 0.339	0.000
	Grip strength	0.363	0.000	0.256	0.002	0.651	0.000			0.390	0.000	− 0.142	0.057	− 0.454	0.000
	OSI	0.148	0.049	0.274	0.001	0.429	0.000	0.390	0.000			− 0.328	0.000	− 0.331	0.000
	BAP	− 0.025	0.390	− 0.122	0.088	− 0.142	0.057	− 0.328	0.000	− 0.445	0.000			0.366	0.000
	NTX	− 0.209	0.010	− 0.339	0.000	− 0.454	0.000	− 0.331	0.000	− 0.406	0.000	0.366	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.