The following are the diagnostic criteria for determining if a person has schizophrenia.
A. Characteristic Symptoms Of Schizophrenia Disorder : When two or more of these symptoms exist for a certain or significant amount of time the first month or less depending on if it was treated.
B. Social/ Occupational Dysfunction: When there has been a significant disturbance within a relationship or work setting. Also deals with a pause in self-care.
C. Duration: When said issues or disturbances last for six months or longer. When the person is manifested negatively with the following symptoms in section A.
D. Schizoaffective and Mood Disorder Illusion: When psychotic features have been ruled out because they show no form of major depression or manic.
E. Substance/ General Medical Condition Exclusion: When the illness is not due to any use of drug substance that would cause any psychological problems.
F. The Relationship To A Pervasive Development Disorder: If there is a relation to Autistic Disorder or any other Pervasive Development Disorder, it is a must that the Schizophrenic symptoms have lasted at least a month to rightly diagnose.
The above symptoms are meant to point out Schizophrenia in general. The next step is to properly disclaim which sub-type the patient would fall under.