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Machine learning variable importance. (A) Average neural net variable importance using the area‐under the ROC method. The maximum possible importance is ‘1.0’. (B) Tree‐based importance in AdaBoost. The maximum possible importance is ‘100’. AUD/PAU = Alcohol use disorder/Problematic alcohol use; MDD/DEP = Major depressive disorder/Depression; SCZ = Schizophrenia; ICV/BV = Intracranial volume/Brain volume.
