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The calibration plot of the nomogram for predicting 3-month unfavorable outcomes of stroke patients treated with mechanical thrombectomy. The x-axis represents the predicted probability of unfavorable outcome calculated using the nomogram. The y-axis represents the actual rate of unfavorable outcome. The dashed line is the reference line where an ideal nomogram would lie. The dotted line is the performance of the nomogram, while the solid line corrects for any deviation of the nomogram
