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Table 2: The metabolite concentrations and T2_B values of the patients and control subjects*
Subjects Metabolite Concentrations (mmol/kg brain) T2_B Values (ms)
N-acetylaspartate Creatine Choline
First-episode group 
    Patients (n = 12) 8.97 ± 0.82 3.63 ± 0.23 1.21 ± 0.08 76.17 ± 12.26
    Controls (n = 14) 10.41 ± 0.45 3.56 ± 0.27 1.18 ± 0.07 57.93 ± 6.85
    Significance P < .001 P = .54 P = .39 P < .001
Chronic group 
    Patients (n = 16) 8.86 ± 0.89 3.68 ± 0.35 1.22 ± 0.09 78.03 ± 12.09
    Controls (n = 14) 10.40 ± 0.44 3.72 ± 0.25 1.26 ± 0.10 60.57 ± 7.85
    Significance P < .001 P = .66 P = .99 P < .001
Combined group 
    Patients (n = 28) 8.91 ± 0.84 3.65 ± 0.30 1.24 ± 0.11 77.23 ± 11.97
    Controls (n = 28) 10.40 ± 0.44 3.64 ± 0.27 1.22 ± 0.10 59.25 ± 7.35
    Significance P < .001 P = .84 P = .45 P < .001
* Data are given as mean ± SD.