Metabolomic Classification of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome via Explainable Ensemble Learning and Pareto-Guided Feature Selection.

Of these 20 metabolites, only five showed nominally significant univariate differences between ME/CFS cases and controls (indole-3-propionic acid, aminomalonate, ornithine, leucine, and succinic acid; all p < 0.05), while the majority—including proline and indole-3-lactate, the constituents of the top-ranked interaction term—did not reach univariate significance in isolation ( p = 0.777 and p = 0.237, respectively).

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