. 2013 May 20;8(5):e63339. doi: 10.1371/journal.pone.0063339

Table 4. Covariate-adjusted mean (SEM) bone mineral density of the whole body by quartiles of each WA-index of FM.

	BMD of the Whole Body						%Diff.	ANCOVA	Z-score
	Q1		Q2–Q3		Q4			P	Linear Regression
	Mean ± SEM	N	Mean ± SEM	N	Mean ± SEM	N			B	SEM
	g/cm²		g/cm²		g/cm²				mg/cm²	mg/cm²
Women
Body weight	1.037±0.007	432	1.065±0.005^†††	842	1.075±0.008^††	421	3.74	<0.001	29.11	4.60***
WA-total FM	1.082±0.006	414	1.060±0.005^†††	845	1.043±0.006^†††	436	−3.65	<0.001	−16.78	2.47***
WA-total %FM	1.085±0.006	417	1.059±0.005^†††	842	1.041±0.006^†††	436	−4.05	<0.001	−16.33	2.44***
WA-android FM	1.081±0.006	406	1.058±0.005^†††	855	1.046±0.006^†††	434	−3.25	<0.001	−13.48	2.46***
WA-android %FM	1.081±0.006	411	1.056±0.005^†††	851	1.051±0.006^†††	433	−2.77	<0.001	−11.87	2.42***
WA-trunk FM	1.089±0.006	409	1.057±0.005^†††	852	1.043±0.006^†††	434	−4.21	<0.001	−17.95	2.49***
WA-trunk %FM	1.089±0.006	412	1.056±0.005^†††	853	1.043±0.006^†††	430	−4.29	<0.001	−17.61	2.46***
WA-limb FM	1.068±0.006	423	1.061±0.005	846	1.054±0.006	426	−1.26	0.118	−6.59	2.31**
WA-limb %FM	1.069±0.006	419	1.061±0.005	848	1.052±0.006^†	428	−1.54	0.043	−7.65	2.35**
WA-trunk to limb %FM ratio	1.077±0.006	413	1.056±0.005^††	854	1.054±0.006^††	428	−2.16	<0.001	−6.69	2.30**
WA-FM to LM ratio	1.083±0.006	415	1.060±0.005^†††	844	1.043±0.006^†††	436	−2.86	<0.001	−16.35	2.45***
Men
Body weight	1.169±0.010	168	1.188±0.007	345	1.192±0.011	169	1.95	0.148	17.95	7.41^*
WA-total FM	1.213±0.009	170	1.185±0.007^†	339	1.139±0.009^†††	173	−6.03	<0.001	−29.82	4.19***
WA-total %FM	1.217±0.009	168	1.185±0.007^††	342	1.140±0.009^†††	172	−6.29	<0.001	−28.32	4.10***
WA-android FM	1.214±0.009	167	1.177±0.007^†††	342	1.165±0.009^†††	173	−4.05	<0.001	−19.95	4.15***
WA-android %FM	1.209±0.009	167	1.181±0.007^†	342	1.158±0.009^†††	173	−4.25	<0.001	−18.56	4.10***
WA-trunk FM	1.218±0.009	169	1.180±0.007^†††	340	1.151±0.009^†††	173	−5.48	<0.001	−26.90	4.16***
WA-trunk %FM	1.215±0.009	168	1.181±0.007^††	342	1.150±0.009^†††	172	−5.31	<0.001	−26.35	4.11***
WA-limb FM	1.208±0.009	170	1.186±0.007^†	341	1.152±0.009^†††	171	−5.03	<0.001	−21.89	4.01***
WA-limb %FM	1.208±0.009	169	1.186±0.007	341	1.152±0.009^†††	172	−4.67	<0.001	−23.49	4.02***
WA-trunk to limb %FM ratio	1.188±0.009	170	1.186±0.008	341	1.177±0.009	171	−0.94	0.555	−3.13	3.87
WA-FM to LM ratio	1.214±0.009	168	1.185±0.007^††	342	1.141±0.009^†††	172	−6.00	<0.001	−28.31	4.10***

FM, LM, BMD, WA-: see Table 2.

ANCOVA (analysis of covariance) and linear regression: see Table 2.

% Diff.: percentage difference = (Q4–Q1)/Q1×100%.

P: P for group difference.

^{†, ††, †††}

: compared with Q1, P<0.05, P<0.01, P<0.001 (Bonferroni).

, **, ***: P for the linear trend (linear regression), P<0.05, P<0.01, P<0.001.