We were collected the data from the psychiatric outpatient department clinic, including the record of schizophrenia (F20) and other mental and behavioral disorders due to the psychoactive substance usage (F10-F19).
After that we were organized by combining the schizophrenia and other mental and behavioral disorder into the same format in order to select the patients who have them concurrently joined by HN number as the primary key. The missing data such as the lack of any attribute data would be excluded from the dataset.