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TABLE 1: Ratios of metabolite peak areas
Ratio Patients Control Subjects Difference (%) Mann-Whitney U^*
TR/TE = 1500/30 
    NAA/Cr 1.59 ± 0.60 1.20 ± 0.27 32.5 0.002
    NAA/Cho 1.90 ± 0.33 1.60 ± 0.37 18.8 0.012
    Cho/Cr 0.85 ± 0.37 0.76 ± 0.10 11.8 NS
Tr/TE = 1500/144 
    NAA/Cr 1.65 ± 0.27 1.63 ± 0.23 1.2 NS
    NAA/Cho 1.62 ± 0.24 1.50 ± 0.17 8.0 0.016
    Cho/Cr 1.04 ± 0.20 1.09 ± 0.15 −4.6 NS
* Ties included in the analysis.

Ratio	Patients	Control Subjects	Difference (%)	Mann-Whitney U^*
TR/TE = 1500/30
NAA/Cr	1.59 ± 0.60	1.20 ± 0.27	32.5	0.002
NAA/Cho	1.90 ± 0.33	1.60 ± 0.37	18.8	0.012
Cho/Cr	0.85 ± 0.37	0.76 ± 0.10	11.8	NS
Tr/TE = 1500/144
NAA/Cr	1.65 ± 0.27	1.63 ± 0.23	1.2	NS
NAA/Cho	1.62 ± 0.24	1.50 ± 0.17	8.0	0.016
Cho/Cr	1.04 ± 0.20	1.09 ± 0.15	−4.6	NS