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(a) Random Forest Analysis (RFA) and (b) Receiver Operating Characteristic (ROC) investigations on the prediction of Weighted Standing Time (WST) using only correctly predicted cases from the WST classes 0 versus 1, and the relative importance of activin B and pathology markers in separating the two WST classes of ME/CFS severity. Correct case prediction was performed via RF. AUC—area under curve (accuracy calculation from true and false positive rates).
