Table 2.

Concentrations of elements (in mg/kg on dry mass basis) and differences between them in the cancellous and cortical bone of the femur (N = 96).

Metal	Femoral head	Femoral neck	M-W
	AM ± SD	AM ± SD
	Med.	Med.
	Min. and Max.	Min. and Max.
Ca	136705.6 ± 36168.7	157212.3 ± 40448.5	p < 0.01
	130519	153269
	69364–216920	65524–252100
P	62723 ± 16774.4	70652.3 ± 18279.3	p < 0.01
	59094.6	69616.2
	33104–98424	29480–109180
Mg	1446.76 ± 359.2	1585.8 ± 320.2	p < 0.01
	1381.2	1595.3
	834.3–2528.6	782.9–2243.9
Na	5466.5 ± 1043.9	4681.2 ± 884.6	p < 0.01
	5428.6	4662.1
	3244.2–8566.9	2228.7–6624.7
K	842.4 ± 685.7	972.1 ± 1136.3	NS
	679.3	647.1
	297–6343.1	250–9340
Zn	72.09 ± 16	68.7 ± 13.38	NS
	69.84	66.21
	45.68–112.68	43.06–108.17
Cu	0.91 ± 0.88	0.89 ± 1.15	NS
	0.83	0.72
	0.04–3.56	0.04–6.58
Cr	1.33 ± 2.24	1.44 ± 1.73	NS
	0.49	0.83
	0.12–14.32	0.12–8.09
Ni	0.6 ± 1.26	0.79 ± 2.28	NS
	0.03	0.03
	0.03–7.38	0.03–14.88
Fe	124.42 ± 106.18	131.52 ± 139.28	NS
	91.14	90.97
	10.5–499.28	20.63–839.58
Sr	44 ± 26.5	47.3 ± 22.7	p = 0.045
	36.6	43.2
	1.3–150.9	16.3–137.5
Ba	2.47 ± 1.68	2.41 ± 1.3	NS
	2.09	2.25
	0.13–9.05	0.24–7.01
Mo	0.56 ± 0.6	0.73 ± 0.68	p = 0.034
	0.18	0.18
	0.18–2.04	0.18–3.1
Pb	1.15 ± 1.51	1.08 ± 1.37	NS
	0.32	0.32
	0.32–6.28	0.32–7.52

AM: arithmetic mean; SD: standard deviation; Med.: median; Min.: minimal obtained concentration, Max.: maximum obtained concentration; M-W: Mann-Whitney U-test; p: level of significance; NS: nonsignificant difference.