Table 3.2.

Pearson correlations between GABA levels, UPDRS total score, rigidity, tremor and age, listed as correlation coefficients (r) and p values (p)

		GABA (Str)	UPDRS	Rigidity	Tremor	Age
GABA (Thal)	r	0.24	0.16	0.22	0.15	0.21
	p	0.15	0.32	0.17	0.37	0.19
GABA (Str)	r		−0.02	−0.06	0.08	0.16
	p		0.92	0.72	0.63	0.34
UPDRS	r			0.50	0.61	0.45
	p			0.001	<0.0001	0.004
Rigidity	r				0.10	0.24
	p				0.55	0.15
Tremor	r					0.32
	p					0.05

GABA (Thal): thalamic GABA levels; GABA (Str): striatal GABA levels; UPDRS: UPDRS III total scores; Rigidity: Rigidity scores; Tremor: Tremor scores