Table 2.

Statistical assessment of the differences of median concentration of metals according to the type of patient and the type of body fluid by the use of Mann-Whitney's U test

Body Fluid	Metal	Sex	Median Obesity (mg/L)	Median Control group (mg/L)	U	p value	No. Obesity	No. Control group
Blood	Cd	All	0.004	0.003	472.5	0.020122	56	25
		M	0.004	0.003	83.5	0.080357	27	10
		F	0.004	0.003	154.0	0.118305	29	15
	Co	All	0.022	0.035	153.0	<0.0000001	56	25
		M	0.021	0.037	43.0	0.001726	27	10
		F	0.024	0.033	39.0	0.00001	29	15
	Cu	All	1.180	1.680	50.0	<0.0000001	56	25
		M	1.130	1.660	10.0	0.00002	27	10
		F	1.190	1.700	15.0	0.000001	29	15
	Fe	All	478.945	513.900	258.0	0.000006	56	25
		M	478.900	517.200	34.0	0.000588	27	10
		F	478.990	510.650	101.5	0.004238	29	15
	Mn	All	0.016	0.016	620.0	0.414604	56	25
		M	0.016	0.017	115.0	0.503324	27	10
		F	0.015	0.015	148.0	0.086257	29	15
	Zn	All	6.375	9.250	25.0	<0.0000001	56	25
		M	6.360	9.190	0.0	0.000004	27	10
		F	6.390	9.340	15.0	0.000001	29	15
	Ni	All	0.009	0.007	224.0	0.000001	56	25
		M	0.008	0.007	64.0	0.015603	27	10
		F	0.009	0.007	38.5	0.000009	29	15
Plasma	Cd	All	0.006	0.006	649.5	0.608517	56	25
		M	0.006	0.006	90.0	0.127365	27	10
		F	0.006	0.006	188.5	0.479450	29	15
	Co	All	0.002	0.003	282.0	0.000019	56	25
		M	0.002	0.003	63.5	0.014984	27	10
		F	0.002	0.003	73.0	0.000356	29	15
	Cu	All	1.120	1.270	207.0	<0.0000001	56	25
		M	1.140	1.270	43.0	0.001722	27	10
		F	1.110	1.270	58.5	0.000086	29	15
	Fe	All	1.115	1.460	311.0	0.00007	56	25
		M	1.090	1.460	92.0	0.145329	27	10
		F	1.120	1.465	47.5	0.000027	29	15
	Mn	All	0.005	0.009	525.5	0.075073	56	25
		M	0.004	0.009	98.5	0.217849	27	10
		F	0.005	0.008	163.0	0.180821	29	15
	Zn	All	0.930	1.340	0.0	<0.0000001	56	25
		M	0.94	1.340	0.0	0.000004	27	10
		F	0.870	1.320	0.0	<0.0000001	29	15
	Ni	All	0.002	0.002	56.5	0.151539	9	19
		M	0.002	0.002	8.0	0.133942	5	7
		F	0.002	0.002	23.0	0.950396	4	12
Urine	Cd	All	0.013	0.010	178.0	0.000109	45	20
		M	0.013	0.010	32.0	0.015341	20	8
		F	0.012	0.010	59.0	0.003212	25	12
	Co	All	0.004	0.005	540.0	0.101793	56	25
		M	0.004	0.005	124.5	0.731019	27	10
		F	0.003	0.004	122.0	0.018360	29	15
	Cu	All	0.015	0.020	526.5	0.075004	29	15
		M	0.020	0.020	102.0	0.262195	27	10
		F	0.010	0.020	156.5	0.131537	29	15
	Fe	All	0.120	0.150	357.0	0.000418	56	25
		M	0.120	0.150	84.5	0.085286	27	10
		F	0.120	0.150	82.5	0.000779	29	15
	Mn	All	0.005	0.003	34.0	<0.0000001	38	21
		M	0.005	0.003	1.5	0.000120	22	7
		F	0.006	0.002	19.0	0.000093	16	14
	Zn	All	0.430	0.660	111.0	<0.0000001	56	25
		M	0.450	0.580	9.5	0.000019	27	10
		F	0.420	0.715	45.5	0.000021	29	15
	Ni	All	0.016	0.017	644.0	0.568820	56	25
		M	0.015	0.016	90.0	0.127002	27	10
		F	0.019	0.019	45.5	0.369336	29	15