The articles in schizophrenia have found the cause of schizophrenia is associated with the substance used. Which found that the type of substance abuse, age, behavioral of substance abuse and schizophrenia status, so this study step grouped the data into 24 datasets based on the combination of the following categories: (1) psychoactive substance used, (2) duration of the substance use, (3) patient demographic data, and (4) schizophrenia status.