Table 1. Individual concentrations [arbitrary units] of the three main metabolites NAA, choline, and creatine in PD patients and age-matched controls.

	Controls (n = 24)			PD patients (n = 21)			p value2
	rostral	caudal	p value1	rostral	caudal	p value1	rostral	caudal
S/N	9.1±1.5	7.9±1.4	<0.001	8.4±2.0	7.4±1.8	<0.001	0.085	0.178
FWHM (ppm)	0.09±0.02	0.09±0.02	0.638	0.10±0.03	0.09±0.03	0.028	0.033	0.817
NAA+NAAG	57.9±10.8	49.8±9.6	<0.001	47.7±17.5	42.6±13.8	0.005	0.002	0.006
GPC+PCh	5.5±1.2	6.5±1.6	<0.001	4.8±2.0	5.9±2.1	<0.001	0.034	0.114
Cr+PCr	30.3±5.3	29.4±6.3	0.299	28.9±11.4	25.9±9.9	0.016	0.476	0.052

¹ Significance values from paired t-test between the rostral and caudal values within the group.

² Significance values from two-sample t-test between both groups.