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Table 2:

1H-MRS white matter parieto-occipital metabolite absolute concentrations, ratios, and water signal intensity, and T2 values in patients with MNGIE and healthy controls

Patients with MNGIE (n = 7) (mean ± SD)Healthy Controls (n = 9) (mean ± SD)P Valuea
Metabolite concentrations (mM)
    NAA6.98 ± 0.799.81 ± 0.94<.001a,c
    Cr4.15 ± 0.485.97 ± 0.55<.001a,c
    Cho1.53 ± 0.231.89 ± 0.24.01a
    mIns4.46 ± 1.145.44 ± 0.76.06a
Metabolite ratios
    NAA/Cr1.85 ± 0.181.80 ± 0.11.57b
    Cho/Cr0.39 ± 0.060.33 ± 0.04.04b
    mIns/Cr0.99 ± 0.270.85 ± 0.08.16b
Water signal (a.u.)
    SBW (0)(14.0 ± 9.0)×1010(10.8 ± 2.0)×1010.370
    SCSF (0)(4.0 ± 7.5)×1010(1.3 ± 0.6)×1010.23a
T2 water
    T2BW (ms)112 ± 2475 ± 8.001a,c
    T2CSF (ms)520 ± 185776 ± 344.098a
  • Note:—a.u. indicates arbitrary units; SBW (0) and SCSF (0), water signals corresponding to brain and cerebrospinal water, respectively; T2BW and T2CSF, water relaxation times corresponding to brain and cerebrospinal water, respectively.

  • a Statistical significance was set at P < .0125 after Bonferroni correction for multiple comparisons.

  • b Statistical significance was set at P < .0167 after Bonferroni correction for multiple comparisons.

  • c Significant.