Table 2. Correlation of body composition estimates using Pearson product moment correlation and ordinary least products regression.

Method	r	a	95% CI	b	95% CI	Fixed bias	Proportional bias	SEE
Boys (n = 72)
LBM8SF	0.971	-3.533	-5.188, -1.877	1.053	0.991, 1.115	Yes	No	1.368
LBM8MF	0.989	0.354	-0.509, 1.217	0.991	0.957, 1.026	No	No	0.839
FM8SF	0.986	3.248	2.813, 3.683	0.974	0.934, 1.014	Yes	No	1.283
FM8MF	0.993	0.854	0.508, 1.200	1.050	1.020, 1.078	Yes	Yes	0.876
%BF8SF	0.949	12.962	11.586, 14.339	0.776	0.715, 0.838	Yes	Yes	3.285
%BF8MF	0.976	3.880	2.530, 5.229	0.964	0.913, 1.014	Yes	No	2.256
ALM8SF	0.922	1.115	0.265, 2.178	0.748	0.673, 0.823	Yes	Yes	1.116
ALM8MF	0.970	0.287	-0.337, 0.912	0.758	0.713, 0.804	No	Yes	0.698
Girls (n = 78)
LBM8SF	0.982	-2.354	-3.469, -1.329	0.996	0.952, 1.042	Yes	No	1.043
LBM8MF	0.994	0.213	-0.373, 0.800	0.972	0.947, 1.002	No	No	0.616
FM8SF	0.976	2.375	1.911, 2.840	1.132	1.074, 1.189	Yes	Yes	1.064
FM8MF	0.991	0.822	0.492, 1.153	1.102	1.068, 1.137	Yes	Yes	0.666
%BF8SF	0.897	10.609	8.407, 12.810	0.954	0.847, 1.061	Yes	No	3.141
%BF8MF	0.925	5.336	3.638, 7.434	0.984	0.892, 1.077	Yes	No	2.707
ALM8SF	0.956	-1.408	-2.190, -0.627	0.920	0.848, 0.989	Yes	Yes	0.783
ALM8MF	0.974	0.383	-0.110, 0.876	0.727	0.668, 0.765	No	Yes	0.596

Abbreviations: r, Pearson product moment correlation coefficient; a, b, coefficients in ordinary least products regression model: E(A) = a + b(B); a, (y axis) intercept; b, slope; fixed bias, if 95% confidence interval (CI) for a does not include 0; proportional bias, if 95% confidence interval (CI) for b does not include 1; SEE, standard error of the estimate.