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Line graphs that show the sensitivity, precision and F1-score calculated for each probability threshold for the three validation folds. To determine the optimal probability threshold, we choose the threshold with the highest F1-score as determined via Equation (4). In the above plots, these are denoted as “best threshold”. For fold 1, this threshold was 0.96, for fold 2, it was 0.84, and for fold 3, it was 0.91.
