Fig. 2.

SHAP Summary Plot for logistic regression model predictions in each outer loop of nested cross-validation.

Note: An orange dot on the right side of the graph indicates that a high feature value corresponds to a contribution towards a prediction of severe withdrawal.

Note. SHAP Summary Plot demonstrating the contribution of each feature to the model prediction. Dots with an orange color indicate a higher feature value, whereas dots with a green color indicate a lower feature value. The more to the right of the graph the greater the contribution of that feature towards a prediction of a severe withdrawal outcome and vice-versa. ASI-6 - Addiction Severity Index, 6 edition; CSSA - Cocaine Selective Severity Assessment; CTQ - Childhood Trauma Questionnaire; Psychiatric problems means difficulties.