Table 3.

Females: R² and RMSE overall and in subgroups in full sample (n =9215), NHANES 1999–2006

Modela	Overall		Age				Race/Ethnicity						Age × Race/Ethnicity
			8–19 years		≥20 years		White		Black		Mexican		White-Girls		White-Women		Black-Girls		Black-Women		Mexican-Girls		Mexican-Women
	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE	R2	RMSE
A	0.809	3.16	0.819	2.91	0.766	3.22	0.816	3.12	0.819	3.31	0.792	3.10	0.824	2.80	0.781	3.19	0.827	3.14	0.747	3.36	0.809	2.92	0.706	3.17
B	0.807	3.17	0.823	2.88	0.765	3.23	0.816	3.12	0.813	3.31	0.784	3.13	0.827	2.78	0.782	3.19	0.833	3.08	0.741	3.38	0.812	2.90	0.697	3.23
C	0.783	3.36	0.783	3.19	0.739	3.40	0.791	3.32	0.788	3.53	0.760	3.30	0.788	3.07	0.756	3.37	0.790	3.46	0.714	3.55	0.768	3.23	0.676	3.33
D	0.806	3.18	0.817	2.93	0.763	3.24	0.814	3.14	0.812	3.32	0.781	3.16	0.822	2.82	0.780	3.20	0.828	3.12	0.741	3.38	0.805	2.95	0.695	3.24
E	0.769	3.47	0.751	3.42	0.727	3.48	0.779	3.42	0.771	3.67	0.742	3.43	0.755	3.31	0.746	3.44	0.759	3.70	0.696	3.66	0.742	3.40	0.656	3.43
F	0.800	3.23	0.817	2.93	0.755	3.30	0.808	3.19	0.804	3.40	0.779	3.17	0.822	2.82	0.772	3.26	0.829	3.12	0.726	3.48	0.806	2.94	0.691	3.26
G	0.799	3.23	0.820	2.90	0.754	3.31	0.807	3.19	0.807	3.36	0.775	3.20	0.824	2.80	0.771	3.27	0.835	3.06	0.730	3.45	0.808	2.93	0.682	3.30
H	0.795	3.26	0.810	2.98	0.751	3.33	0.803	3.23	0.806	3.38	0.771	3.23	0.815	2.88	0.767	3.29	0.825	3.15	0.731	3.44	0.793	3.04	0.683	3.30
I	0.797	3.25	0.813	2.97	0.752	3.32	0.805	3.21	0.805	3.39	0.769	3.24	0.817	2.86	0.769	3.28	0.828	3.12	0.728	3.46	0.799	3.00	0.676	3.33
J	0.761	3.53	0.748	3.44	0.716	3.55	0.770	3.48	0.764	3.73	0.732	3.49	0.752	3.33	0.735	3.52	0.761	3.69	0.683	3.74	0.735	3.44	0.643	3.50
K	0.752	3.59	0.722	3.61	0.710	3.59	0.761	3.55	0.758	3.77	0.721	3.56	0.725	3.50	0.727	3.56	0.733	3.89	0.685	3.73	0.704	3.64	0.639	3.52
L	0.757	3.56	0.741	3.49	0.712	3.58	0.766	3.52	0.759	3.77	0.731	3.49	0.745	3.37	0.729	3.55	0.745	3.81	0.680	3.75	0.734	3.45	0.642	3.50
M	0.791	3.30	0.798	3.07	0.747	3.35	0.799	3.26	0.802	3.41	0.763	3.28	0.803	2.97	0.764	3.31	0.815	3.24	0.728	3.46	0.778	3.15	0.676	3.33
N	0.748	3.62	0.716	3.65	0.706	3.61	0.757	3.59	0.753	3.80	0.721	3.56	0.719	3.54	0.723	3.59	0.723	3.97	0.682	3.74	0.702	3.65	0.640	3.51
O	0.656	4.24	0.637	4.13	0.606	4.18	0.667	4.20	0.679	4.34	0.650	3.98	0.664	3.87	0.622	4.19	0.676	4.29	0.595	4.23	0.617	4.14	0.566	3.86

Abbreviations: BMI, body mass index; NHANES, National Health and Nutrition Examination Survey; RMSE, root mean square error. Model A: age, race, height, (weight), BMI, triceps, subscapular, waist, calf circumference, (arm circumference), thigh circumference, arm length, leg length and menses; Model B: age, race, height, (weight), BMI, triceps, subscapular, waist, calf circumference, arm circumference and thigh circumference; Model C: age, race, height, weight, BMI, subscapular, waist, calf circumference, arm circumference and thigh circumference; Model D: age, race, height, weight, BMI, triceps, waist, calf circumference, arm circumference and thigh circumference; Model E: age, race, height, weight, BMI, waist, calf circumference, arm circumference and thigh circumference; Model F: age, race, height, weight, BMI, triceps, subscapular, waist and calf circumference; Model G: age, race, height, weight, BMI, triceps, subscapular, waist and arm circumference; Model H: age, race, height, weight, BMI, triceps, subscapular, arm circumference Model I: age, race, height, weight, BMI, triceps and waist; Model J: age, race, height, weight, BMI, waist, arm circumference Model K: age, race, height, (weight) BMI and arm circumference; Model L: age, race, height, weight, BMI and waist; Model M: age, race, height, weight, BMI and triceps; Model N: age, race, height, weight and BMI; Model O: BMI.

^aCandidate variables not retained by the selection process are shown in parentheses.