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Table 3 Features selected for the Brain Regions Classifier and the metabolites tentatively assigned to those features

From: Brain metabolic pattern analysis using a magnetic resonance spectra classification software in experimental stroke

Feature selection order number

Feature chemical shift (ppm)

Assigned metabolite

Non-infarcted parenchyma*

SVZ*

Infarcted parenchyma*

p value†

1

3.05

TCr

5.80 (5.31–6.04)

5.74 (5.26–6.44)

2.43 (2.01–3.32)

p < 0.01

2

3.62

Myo

2.73 (2.31–2.93)

3.45 (3.15–3.91)

1.61 (1.41–2.01)

p < 0.01

3

3.04

TCr

6.92 (6.47–7.37)

6.91 (6.38–7.70)

2.84 (1.95–3.80)

p < 0.01

  1. * Median (interquartile range) for the UL2CA normalized peak height values for each selected spectral feature using the SFFS method in the training set
  2. p value resulting from the non-parametric Kruskall–Wallis test of the comparison of the selected spectral feature among the three classes of the training set