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

Table 3. Covariate-adjusted mean (SEM) bone mineral density of the total hip by quartiles of each WA-index of FM.

	BMD of the total hip						%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	0.771±0.007	432	0.810±0.005^†††	842	0.830±0.008^†††	421	7.65	<0.001	46.08	4.66***
WA-total FM	0.820±0.006	414	0.804±0.005^†	845	0.795±0.006^††	436	−3.01	0.002	−10.11	2.52***
WA-total %FM	0.819±0.006	417	0.805±0.005	842	0.796±0.006^††	436	−2.77	0.004	−7.93	2.50**
WA-android FM	0.818±0.006	406	0.803±0.005^†	855	0.800±0.006^†	434	−2.31	0.012	−7.71	2.51**
WA-android %FM	0.815±0.006	411	0.804±0.005	851	0.802±0.006	433	−1.61	0.105	−4.89	2.47^*
WA-trunk FM	0.820±0.006	409	0.804±0.005^†	852	0.797±0.006^††	434	−2.73	0.004	−6.91	2.55**
WA-trunk %FM	0.819±0.006	412	0.803±0.005^†	853	0.799±0.006^†	430	−2.49	0.006	−6.02	2.53^*
WA-limb FM	0.814±0.006	423	0.806±0.005	846	0.799±0.006	426	−1.86	0.072	−6.87	2.34**
WA-limb %FM	0.814±0.006	419	0.806±0.005	848	0.799±0.006	428	−1.81	0.090	−6.15	2.38^*
WA-trunk to limb %FM ratio	0.808±0.006	413	0.805±0.005	854	0.807±0.006	428	−0.11	0.848	1.91	2.34
WA-FM to LM ratio	0.819±0.006	415	0.804±0.005^†	844	0.797±0.006^††	436	−2.67	0.005	−8.52	2.50**
Men
Body weight	0.862±0.010	168	0.922±0.008^†††	345	0.946±0.011^†††	169	9.71	<0.001	54.76	7.86***
WA-total FM	0.935±0.010	170	0.914±0.008	339	0.882±0.010^†††	173	−5.57	<0.001	−21.62	4.53***
WA-total %FM	0.936±0.010	168	0.914±0.008	342	0.885±0.010^†††	172	−5.38	<0.001	−18.22	4.44***
WA-android FM	0.929±0.010	167	0.906±0.008	342	0.911±0.010	173	−1.98	0.077	−9.40	4.46^*
WA-android %FM	0.924±0.010	167	0.911±0.008	342	0.904±0.010	173	−2.16	0.253	−7.48	4.40
WA-trunk FM	0.936±0.010	169	0.908±0.008^†	340	0.898±0.010^††	173	−4.07	0.005	−15.51	4.50**
WA-trunk %FM	0.931±0.010	168	0.911±0.008	342	0.896±0.010^†	172	−3.82	0.018	−13.53	4.46**
WA-limb FM	0.939±0.009	170	0.914±0.008^†	341	0.881±0.010^†††	171	−6.20	<0.001	−20.55	4.28***
WA-limb %FM	0.934±0.010	169	0.915±0.008	341	0.888±0.010^††	172	−4.88	0.001	−19.70	4.30***
WA-trunk to limb %FM ratio	0.901±0.009	170	0.919±0.008	341	0.918±0.009	171	1.83	0.166	8.17	4.09^*
WA-FM to LM ratio	0.935±0.010	168	0.913±0.008	342	0.886±0.010^†††	172	−5.21	0.001	−18.96	4.44***

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.