Table 5. Elements concentration in CSF and serum of tremor-dominant PD versus control.

Elements	CSF Concentration Average (±SD)			Serum Concentration Average (±SD)
	Normal	PD	p-value	Normal	PD	p-value
Al	2.90 (±0.90)	2.46 (±1.53)	0.2403	3.22 (±1.57)	4.21 (±2.03)	<0.00001*
Ca	25212.3 (±6545.3)	27847.2 (±3424.4)	0.03579*	65486.6 (±1774.7)	70897.4 (±2207. 8)	<0.00001*
Co	0.15 (±0.07)	0.07 (±0.12)	<0.00001*	0.14 (±0.25)	0.13 (±0.30)	0.0748
Cu	25.56 (±5.06)	25.96 (±8.33)	0.9834	1109.33 (±97.50)	894.30 (±196.08)	<0.00001*
Cr	0.82 (±0.73)	1.20 ((±0.43)	0.0191*	0.77 (±0.77)	0.88 (±0.87)	0.1911
Fe	211.32 (±23.42)	187.29 (±89.49)	0.0164*	1146.58 (±299.57)	1137.33 (±260.59)	0.05455
Pb	0.21 (±0.74)	1.01 (±0.95)	<0.00001*	0.44 (±0.24)	0.50 (±0.39)	0.6181
Mg	23092.8 (±2524.9)	25302.9 (±3375.4)	0.00288*	19977.2 (±1375.4)	20510.1 (±1227.6)	0.00026*
Mn	1.27 (±0.90)	0.75 (±0.67)	0.00232*	1.41 (±1.10)	1.31 (±1.12)	0.1934
Si	95.41 (±39.66)	72.63 (±29.26)	0.01711*	386.99 (±96.01)	389.42 (±101.50)	0.6105
Zn	32.69 (±6.75)	26.27 (±8.25)	0.00078*	693.58 (±89.23)	689.43 (±85.31)	0.2312