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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