Table 3.

Age and organ weight regression model with FFM and FM as covariates

Model	Variable	Regression Coefficient ± SE	P Value	R2 Explained Variance
Brain	Intercept	1.194±0.084	<0.0001
	Age	−0.003±0.001	<0.0001	0.10
	FFM	0.002±0.002	0.293
	FM	−0.001±0.022	0.257
	Race	−0.063±0.023	0.006
	Sex	0.130±0.041	0.002
				Total: 0.54
LVM	Intercept	0.022±0.021	0.292
	Age	0.0003±0.0001	0.070	0.01
	FFM	0.002±0.0004	<0.0001
	FM	0.001±0.0003	0.006
	Race	0.003±0.006	0.637
	Sex	0.038±0.010	0.0003
				Total: 0.65
Kidney*	Intercept	−1.629±0.115	<0.0001
	Age	−0.002±0.001	0.040	0.02
	FFM	0.009±0.002	<0.0001
	FM	0.006±0.002	<0.0001
	Race	−0.106±0.031	0.001
	Sex	0.030±0.057	0.600
				Total: 0.50
Liver	Intercept	0.688±0.147	<0.0001
	Age	−0.003±0.001	0.005	0.03
	FFM	0.017±0.003	<0.0001
	FM	0.007±0.002	0.001
	Race	−0.116±0.040	0.004
	Sex	−0.007±0.072	0.918
				Total: 0.58
Spleen*	Intercept	−2.327±0.256	<0.0001
	Age	−0.009±0.002	<0.0001	0.11
	FFM	0.012±0.005	0.016
	FM	0.017±0.003	<0.0001
	Race	−0.353±0.069	<0.0001
	Sex	0.263±0.124	0.037
				Total: 0.58

Race: 0 = Caucasian; 1 = African-American. Sex: 0 = women; 1 = men. FFM, fat-free mass; FM, fat mass.

^*Log-transformed values.