Table 2.

Raw and corrected mean GABA+ levels in institutional units obtained from GABA-edited spectra using LCModel with two basis sets (abbreviated as K basis set and G basis set), and corresponding intra-individual and inter-individual coefficients of variation (CVs).

	Left Cerebellar Dentate						Right Cerebellar Dentate
	K basis set			G basis set			K basis set			G basis set
	Levels	Intra- individual CVs (%)	Inter- individual CVs (%)	Levels	Intra- individual CVs (%)	Inter-individual CVs (%)	Levels	Intra- individual CVs (%)	Inter- individual CVs (%)	Levels	Intra- individual CVs (%)	Inter- individual CVs (%)
Raw GABA+	1.64 ± 0.39	12.0 ± 3.7	23.6	2.24 ± 0.32	4.7 ± 3.1	14.2	1.86 ± 0.32	5.0 ± 3.7	17.3	2.40 ± 0.34	8.7 ± 4.3	14.1
Corrected GABA+	1.05 ± 0.25	11.9 ± 4.1	23.9	1.44 ± 0.21	5.3 ± 2.9	14.4	1.15 ± 0.20	5.0 ± 3.7	17.6	1.49 ± 0.21	8.5 ± 3.7	14.1
Raw GABA+/Cr	0.17 ± 0.04	13.9 ± 6.9	25.6	0.23 ± 0.03	6.6 ± 5.0	14.5	0.19 ± 0.05	6.9 ± 7.0	27.0	0.25 ± 0.05	9.5 ± 2.5	21.3
Corrected GABA+/Cr	0.22 ± 0.05	13.4 ± 6.3	24.2	0.30 ± 0.04	6.1 ± 4.8	13.7	0.25 ± 0.05	5.0 ± 2.9	20.9	0.32 ± 0.05	8.0 ± 3.6	16.4
Raw GABA+/NAA	0.15 ± 0.03	9.4 ± 7.3	20.4	0.21 ± 0.03	5.1 ± 3.5	13.2	0.17 ± 0.02	7.9 ± 5.1	14.8	0.22 ± 0.03	9.8 ± 8.6	14.1
Corrected GABA+/NAA	0.24 ± 0.05	11.5 ± 4.2	22.1	0.33 ± 0.04	4.4 ± 2.8	12.6	0.27 ± 0.05	4.0 ± 2.8	18.1	0.35 ± 0.05	9.3 ± 5.9	15.6