Fig. 4.

Relationship between baseline classification scores and change in treatment response over the courses of ECT (after controlling for age, gender, years of education, and length of illness). Scatterplots show baseline SVM scores were negatively correlated with the symptom improvement as measured by PANSS positive subscores (a), PANSS negative subscores (b), PANSS general subscores (c), and PANSS total scores (d). ECT electroconvulsive therapy, SVM support vector machine, PANSS positive and negative syndrome scale